11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.
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Transcript of 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.
![Page 1: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/1.jpg)
11/13/201011/13/2010
Naming and Writing FormulasA Review Activity for Panther-Chemists
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What do you want to do?
• Determine whether a compound is ionic or covalent
• Write a chemical formula given a word name• Write a word name given a chemical formula• Translate a chemical reaction from symbols to
words• Translate a chemical reaction from words to s
ymbols
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11/13/201011/13/2010
How to determine whether a compound is ionic or covalent
• First, grab your periodic table and ion sheet. When you are ready, you may continue…
![Page 4: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/4.jpg)
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• Find the zigzag line on your periodic table (it is in the “p-block”)
How to determine whether a compound is ionic or covalent
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11/13/2010
• Recall that metals are located to the left of the zigzag line
11/13/2010
How to determine whether a compound is ionic or covalent
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11/13/2010
• …and nonmetals are located to the left of the zigzag
11/13/2010
How to determine whether a compound is ionic or covalent
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• If a compound is made of a metal and nonmetal, it is ionic; the metal ion always appears first in a chemical name
11/13/2010
How to determine whether a compound is ionic or covalent
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11/13/2010
• If a compound is made of all nonmetals, it is covalent
11/13/2010
How to determine whether a compound is ionic or covalent
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11/13/201011/13/2010
How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Calcium chloride
![Page 10: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/10.jpg)
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How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Calcium chloride Ionic
CaCl
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11/13/201011/13/2010
How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Aluminum phosphate
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11/13/201011/13/2010
How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Aluminum phosphate Ionic
Al
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11/13/201011/13/2010
How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Carbon tetrachloride
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How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Carbon tetrachloride CovalentC
Cl
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How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Mercury (II) sulfate
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11/13/201011/13/2010
How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Mercury (II) sulfate Ionic
Hg
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How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Ammonium chloride
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• Practice Problems: Determine whether each formula is ionic or covalent
• Ammonium chloride Ionic; because ammonium is a positively charged ion (polyatomic cation found on ion sheet)
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How to determine whether a compound is ionic or covalent
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How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Disulfur pentoxide
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How to determine whether a compound is ionic or covalent
• Practice Problems: Determine whether each formula is ionic or covalent
• Disulfur pentoxide Covalent
SO
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How to write a formula given a name
• First, grab your periodic table and ion sheet. When you are ready, you may continue…
![Page 22: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/22.jpg)
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How to write a formula given a name
• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step 5. [click here if you need a refresher on how to decide whether a compound is ionic or covalent]
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How to write a formula given a name
• Step 1: Determine whether the compound is ionic or covalent; if covalent, use prefixes and stop here. If ionic, continue through step 5.
• Step 2: Split name into two pieces, usually after the first word
![Page 24: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/24.jpg)
11/13/201011/13/2010
How to write a formula given a name
• Step 1: Determine whether the compound is ionic or covalent; if covalent, use prefixes and stop here. If ionic, continue through step 5.
• Step 2: Split name into two pieces, usually after the first word
• Step 3: Write the ions for each piece
![Page 25: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/25.jpg)
11/13/201011/13/2010
How to write a formula given a name
• Step 1: Determine whether the compound is ionic or covalent; if covalent, use prefixes and stop here. If ionic, continue through step 5.
• Step 2: Split name into two pieces, usually after the first word
• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross
![Page 26: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/26.jpg)
11/13/201011/13/2010
How to write a formula given a name
• Step 1: Determine whether the compound is ionic or covalent; if covalent, use prefixes and stop here. If ionic, continue through step 5.
• Step 2: Split name into two pieces, usually after the first word
• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if
the formula can be reduced
![Page 27: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/27.jpg)
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How to write a formula given a name
• Ready for practice? Try to write the given formulas. When you have an answer, click through to check your work. Continue to the next page…
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11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for barium chloride.
![Page 29: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/29.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for barium chloride.• Step 1: Ionic, because the first part of the name, barium, is a metal
![Page 30: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/30.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for barium chloride.• Step 1: Ionic, because the first part of the name, barium, is a metal• Step 2: barium / chloride
![Page 31: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/31.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for barium chloride.• Step 1: Ionic, because the first part of the name, barium, is a metal• Step 2: barium / chloride• Step 3: Ba2+ / Cl- (note: use your periodic table to determine charges
of individual elements; use your ion sheet to write out polyatomic ions)
![Page 32: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/32.jpg)
11/13/2010
PRACTICE PROBLEMS: Write the formula for barium chloride.• Step 1: Ionic, because the first part of the name, barium, is a metal• Step 2: barium / chloride• Step 3: Ba2+ / Cl- (note: use your periodic table to determine charges
of individual elements; use your ion sheet to write out polyatomic ions)• Step 4:
Ba Cl
11/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
2 + -
![Page 33: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/33.jpg)
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PRACTICE PROBLEMS: Write the formula for barium chloride.• Step 1: Ionic, because the first part of the name, barium, is a metal• Step 2: barium / chloride• Step 3: Ba2+ / Cl- (note: use your periodic table to determine charges
of individual elements; use your ion sheet to write out polyatomic ions)• Step 4:• Step 5:
Parenthesis are only needed when a polyatomic ion has a subscript (number) greater than 1. The ion ratio 1Ba:2Cl can not be reduced.
BaCl
11/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
2
![Page 34: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/34.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for copper (II) sulfate.
![Page 35: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/35.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for copper (II) sulfate.• Step 1: Ionic, because the first part of the name, copper, is a metal
![Page 36: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/36.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for copper (II) sulfate.• Step 1: Ionic, because the first part of the name, copper, is a metal• Step 2: copper (II) / sulfate
![Page 37: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/37.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for copper (II) sulfate.• Step 1: Ionic, because the first part of the name, copper, is a metal• Step 2: copper (II) / sulfate• Step 3: Cu2+ / SO4
2-
![Page 38: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/38.jpg)
11/13/2010
PRACTICE PROBLEMS: Write the formula for copper (II) sulfate.• Step 1: Ionic, because the first part of the name, copper (II), is a metal• Step 2: copper (II) / sulfate• Step 3: Cu2+ / SO4
2- (note: the Roman numeral (II) indicates the charge of the copper ion, 2+; the ‘sulfate’ ion is on your ion sheet)
• Step 4:
• Notice how nothing happened to the “4” on the sulfate ion. DO NOT modify numbers that are AREADY there as subscripts (numbers on the bottom) before the criss-cross (already there at Step 3 in ion form).
Cu SO4
11/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
2 + -2
![Page 39: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/39.jpg)
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Cu SO4
PRACTICE PROBLEMS: Write the formula for copper (II) sulfate.• Step 1: Ionic, because the first part of the name, copper (II), is a metal• Step 2: copper (II) / sulfate• Step 3: Cu2+ / SO4
2- (note: the Roman numeral (II) indicates the charge of the copper ion, 2+; the ‘sulfate’ ion is on your ion sheet)
• Step 4:
• Step 5: For now, you will need parenthesis around the sulfate ion because it is a polyatomic ion that received a subscript greater than 1.
• Also, the ion ratio is 2Cu: 2 SO4 which can reduce to 1:1… now you can remove the parenthesis
( )
11/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
22
![Page 40: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/40.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for sulfur trioxide.
![Page 41: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/41.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for sulfur trioxide.• Step 1: Covalent, because the formula contains all nonmetals… 1 sulfur
and three oxygens = SO3… no criss-crossing for covalent compounds. 1 = mono2 = di3 = tri4 = tetra5 = penta6 = hexa7 = hepta8 = octa9 = nona10 = deca
![Page 42: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/42.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for calcium phosphate.
![Page 43: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/43.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for calcium phosphate.• Step 1: Ionic, because the first part of the name, calcium, is a metal
![Page 44: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/44.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for calcium phosphate.• Step 1: Ionic, because the first part of the name, calcium, is a metal• Step 2: calcium / phosphate
![Page 45: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/45.jpg)
11/13/201011/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
PRACTICE PROBLEMS: Write the formula for calcium phosphate.• Step 1: Ionic, because the first part of the name, calcium, is a metal• Step 2: calcium / phosphate• Step 3: Ca 2+ / PO4
3-
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11/13/2010
PRACTICE PROBLEMS: Write the formula for calcium phosphate.• Step 1: Ionic, because the first part of the name, calcium, is a metal• Step 2: calcium / phosphate• Step 3: Ca 2+ / PO4
3-
• Step 4:Ca PO4
11/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
+ -2 3
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11/13/2010
PRACTICE PROBLEMS: Write the formula for calcium phosphate.• Step 1: Ionic, because the first part of the name, calcium, is a metal• Step 2: calcium / phosphate• Step 3: Ca 2+ / PO4
3-
• Step 4:
• Step 5: Because phosphate is a polyatomic ion that received a subscript greater than 1, use parenthesis. The ion ratio is 3Ca: 2PO4; you can not reduce this ratio.
Ca (PO4)
11/13/2010
How to write a formula given a name• Step 1: Determine whether the compound is ionic or covalent ; if covalent, use prefixes and stop here. If ionic, continue through step
5.• Step 2: Split name into two pieces, usually after the first word• Step 3: Write the ions for each piece• Step 4: Drop + and – signs, then criss-cross• Step 5: Add parenthesis if needed and see if the formula can be reduced
23
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11/13/201011/13/2010
How to write a name from a formula
• First, grab your periodic table and ion sheet. When you are ready, you may continue…
![Page 49: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/49.jpg)
11/13/201011/13/2010
How to write a name from a formula
• Step 1: Determine whether the formula is ionic or covalent [if you need help with this step, click here]
• Step 2: Apply appropriate naming rules…-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name Cu(OH)2
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name Cu(OH)2
• Step 1: Ionic
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name Cu(OH)2
• Step 1: Ionic• Step 2: Cu / (OH)2
• First part is named ‘COPPER’• Second part is found on anion side of ion sheet, called ‘HYDROXIDE’• According to cations on ion sheet, copper needs a Roman numeral (can be I or II)• Backwards criss-cross to determine original ion charges in order to identify correct
Roman numeral• Check anion on ion sheet
to verify ions are correct• Copper used to have 2+ charge, therefore, this is copper (II) hydroxide
Cu OH( )2
+ -
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name NO2
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name NO2
• Step 1: Covalent• Step 2: Do not use the prefix ‘mono’ for first element… 1N = nitrogen; 2O =
dioxide… therefore, this is nitrogen dioxide
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name N2O5
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name N2O5
• Step 1: Covalent• Step 2: Do not use the prefix ‘mono’ for first element… 1N = nitrogen; 2O =
dioxide… therefore, this is nitrogen dioxide
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11/13/2010
When a polyatomic ion DOES NOT have parenthesis, you MAY NOT move its subscript for a backwards criss-cross!
Practice problem: Name FePO4
• Step 1: Ionic• Step 2: Fe / PO4
• First part is named ‘IRON’• Second part is found on anion side of ion sheet, called ‘PHOSPHATE’• According to cations on ion sheet, iron needs a Roman numeral (can be II or III)• Backwards criss-cross to determine original ion charges … note there are no
parenthesis around phosphate so the 4 stays in place: Fe / PO4
• Check anion on ion sheet to verify ions are correct… phosphate’s charge of 3- must have cancelled out… the original formula must have looked like this: Fe3(PO4)3
• Iron used to have 3+ charge, therefore, this is iron (III) phosphate11/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
![Page 58: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/58.jpg)
11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name Al2O3
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11/13/201011/13/2010
How to write a name from a formula• Step 1: Determine whether the formula is ionic or covalent• Step 2: Apply appropriate naming rules…
-If covalent, use prefixes except for ‘mono’ on first element-If ionic, split formula into 2 pieces (usually split after first ion). First ion gets its ‘regular’ name… 2nd ion changes ending to –ide if monatomic, or is found on anion side of ion sheet if polyatomic. Check cations on ion sheet for Roman numerals.
Practice problem: Name Al2O3
• Step 1: Ionic• Step 2: Al2 / O3
• First ion is called ‘Aluminum’• Second ion is monatomic so it changes its ending to –ide… ‘oxide’• Aluminum does not need a Roman numeral according to the cations on the ion
sheet• Therefore, this is called aluminum oxide
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11/13/201011/13/2010
How to translate a chemical reaction from symbols to words
• First, grab your periodic table and ion sheet. When you are ready, you may continue…
![Page 61: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/61.jpg)
11/13/201011/13/2010
How to translate a chemical reaction from symbols to words
• Step 1: Make sure the reaction is balanced. If it is not balanced, take a minute to balance it.
• Step 2: Recall that coefficients in a reaction indicate the number of moles. When there are ‘invisible 1’ coefficients, translate them as “one mole of…”
• Step 3: States of matter generally sound best written before a compound; except for ‘gas’, which sounds best after a compound
• Step 4: Review naming rules if you need a refresher• Common symbols:
(s) = solid → = produces; yields; reacts to form; etc.(l) = liquid → = when heated, produces… (g) or (↑) = gas (aq) = aqueous (dissolved in water; solution)(ppt) or (↓) = precipitate
∆
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11/13/201011/13/2010
How to translate a chemical reaction from symbols to words
• Step 1: Make sure the reaction is balanced. If it is not balanced, take a minute to balance it.• Step 2: Recall that coefficients in a reaction indicate the number of moles. When there are ‘invisible 1’ coefficients,
translate them as “one mole of…”• Step 3: States of matter generally sound best written before a compound; except for ‘gas’, which sounds best after a
compound• Step 4: Review naming rules if you need a refresher• Common symbols:
(s) = solid → = produces; yields; reacts to form; etc.(l) = liquid → = when heated, produces… (g) or (↑) = gas (aq) = aqueous (dissolved in water; solution)(ppt) or (↓) = precipitate
∆
Practice Problem: Translate 4Fe(s) + 3O2(g) → 2Fe2O3 (s)
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11/13/201011/13/2010
How to translate a chemical reaction from symbols to words
• Step 1: Make sure the reaction is balanced. If it is not balanced, take a minute to balance it.• Step 2: Recall that coefficients in a reaction indicate the number of moles. When there are ‘invisible 1’ coefficients,
translate them as “one mole of…”• Step 3: States of matter generally sound best written before a compound; except for ‘gas’, which sounds best after a
compound• Step 4: Review naming rules if you need a refresher• Common symbols:
(s) = solid → = produces; yields; reacts to form; etc.(l) = liquid → = when heated, produces… (g) or (↑) = gas (aq) = aqueous (dissolved in water; solution)(ppt) or (↓) = precipitate
∆
Practice Problem: Translate 4Fe(s) + 3O2(g) → 2Fe2O3 (s)
• Step 1: balanced• Step 2, 3, 4:
Four moles solid iron plus three moles oxygen gas produce two moles solid iron (III) oxide.
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11/13/201011/13/2010
How to translate a chemical reaction from symbols to words
• Step 1: Make sure the reaction is balanced. If it is not balanced, take a minute to balance it.• Step 2: Recall that coefficients in a reaction indicate the number of moles. When there are ‘invisible 1’ coefficients,
translate them as “one mole of…”• Step 3: States of matter generally sound best written before a compound; except for ‘gas’, which sounds best after a
compound• Step 4: Review naming rules if you need a refresher• Common symbols:
(s) = solid → = produces; yields; reacts to form; etc.(l) = liquid → = when heated, produces… (g) or (↑) = gas (aq) = aqueous (dissolved in water; solution)(ppt) or (↓) = precipitate
∆
Practice Problem: Translate C6H12O6(s) + 9O2(g) → 6CO2(g) + 6H2O(g)
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11/13/201011/13/2010
How to translate a chemical reaction from symbols to words
• Step 1: Make sure the reaction is balanced. If it is not balanced, take a minute to balance it.• Step 2: Recall that coefficients in a reaction indicate the number of moles. When there are ‘invisible 1’ coefficients,
translate them as “one mole of…”• Step 3: States of matter generally sound best written before a compound; except for ‘gas’, which sounds best after a
compound• Step 4: Review naming rules if you need a refresher• Common symbols:
(s) = solid → = produces; yields; reacts to form; etc.(l) = liquid → = when heated, produces… (g) or (↑) = gas (aq) = aqueous (dissolved in water; solution)(ppt) or (↓) = precipitate
∆
Practice Problem: Translate C6H12O6(s) + 9O2(g) → 6CO2(g) + 6H2O(g)
• Step 1: balanced• Step 2, 3, 4:
One mole solid sugar plus nine moles oxygen gas react to form six moles carbon dioxide gas and six moles water vapor.
• It is OK to use the common name of familiar chemicals like sugar, water, ammonia (NH3), etc.
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11/13/201011/13/2010
How to translate a chemical reaction from words to symbols
• First, grab your periodic table and ion sheet. When you are ready, you may continue…
![Page 67: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/67.jpg)
11/13/201011/13/2010
How to translate a chemical reaction from words to symbols
• Step 1: It is helpful to circle or underline chemical formulas first• Step 2: Translate chemical names to formulas; review naming rules if you need a refresher;
remember that HONFIBrCl make diatomic molecules when they are not in a compound• Step 3: States of matter are always written after the chemical formula• Step 4: Balance the reaction
![Page 68: 11/13/2010 Naming and Writing Formulas A Review Activity for Panther-Chemists.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e025503460f94aebf2c/html5/thumbnails/68.jpg)
11/13/201011/13/2010
How to translate a chemical reaction from words to symbols
• Step 1: It is helpful to circle or underline chemical formulas first• Step 2: Translate chemical names to formulas; review naming rules if you need a refresher;
remember that HONFIBrCl make diatomic molecules when they are not in a compound• Step 3: States of matter are always written after the chemical formula• Step 4: Balance the reaction
Practice problem: Solid potassium chlorate, when heated, decomposes to produce liquid potassium chloride and oxygen gas.
• Step 1: Circle chemical formulas• Step 2: Translate names to formulas• Step 3: KClO3(s) → KCl(l) + O2(g)
• Step 4: 2KClO3(s) → 2KCl(l) + 3O2(g)
KClO3
KCl O2
∆
∆