Ch 6 Nomenclature
description
Transcript of Ch 6 Nomenclature
NomenclaturePOPO44
3-3-
phosphate ionphosphate ion
CC22HH33OO22--
acetate ionacetate ion
HC2H3O2
Acetic Acid
Chemistry and Pre-AP Chemistry
Ch 6
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Forms of Chemical Forms of Chemical BondsBonds
• There are 2 forms bonding There are 2 forms bonding atoms:atoms:
• IonicIonic—(binary) complete —(binary) complete transfer transfer of 1 or more electrons of 1 or more electrons from one atom to another (one from one atom to another (one loses, the other gains)loses, the other gains)
• CovalentCovalent—(molecular) —(molecular) some some valence electrons valence electrons sharedshared between atomsbetween atoms
Common NamesCommon Names• A lot of chemicals have common A lot of chemicals have common
names as well as the proper names as well as the proper IUPAC name.IUPAC name.
• Chemicals that should always be Chemicals that should always be named by common name and named by common name and never named by the IUPAC never named by the IUPAC method are:method are:
• HH22OO water, not dihydrogen water, not dihydrogen
monoxidemonoxide
• NHNH33 ammonia, not nitrogen ammonia, not nitrogen
trihydridetrihydride
CATIONCATION + + ANIONANION ---> --->
COMPOUNDCOMPOUND
CATIONCATION + + ANIONANION ---> --->
COMPOUNDCOMPOUND
A neutral compound A neutral compound requiresrequires
equal number of + equal number of + and - charges.and - charges.
A neutral compound A neutral compound requiresrequires
equal number of + equal number of + and - charges.and - charges.
COMPOUNDCOMPOUNDS FORMED S FORMED FROM IONSFROM IONS
COMPOUNDCOMPOUNDS FORMED S FORMED FROM IONSFROM IONS
NaNa++ + Cl + Cl- - --> NaCl--> NaCl
Predicting Charges on Monatomic IonsPredicting Charges on Monatomic IonsKNOW THESE !!!!KNOW THESE !!!!
+1 +2 -3 -2 -1 0
Cd+2
Properties of Ionic CompoundsProperties of Ionic CompoundsForming NaCl from Na and ClForming NaCl from Na and Cl22
Properties of Ionic CompoundsProperties of Ionic CompoundsForming NaCl from Na and ClForming NaCl from Na and Cl22
• A metal atom can A metal atom can transfer an electron transfer an electron to a nonmetal.to a nonmetal.
• The resulting cation The resulting cation and anion are and anion are attracted to each attracted to each other by other by electrostatic electrostatic forcesforces..
IONIC COMPOUNDSIONIC COMPOUNDSIONIC COMPOUNDSIONIC COMPOUNDS
NH4+
Cl-
ammonium chloride, NHammonium chloride, NH44ClCl
Some Ionic CompoundsSome Ionic CompoundsSome Ionic CompoundsSome Ionic Compounds
MgMg2+2+ + N + N-3-3 ----> ---->
MgMg33NN22
magnesiummagnesium nitridenitride
SnSn4+4+ + O + O2-2- ----> ---->
SnOSnO22
Tin (IV) oxideTin (IV) oxide
calcium fluoridecalcium fluoride
CaCa2+2+ + 2 F + 2 F-- ---> ---> CaFCaF22
Formulas of Ionic CompoundsFormulas of Ionic Compounds
Formulas of ionic compounds are determined from the charges on the ions
atoms ions
–
Na + F : Na+ : F : NaF
sodium + fluorine sodium fluoride formula
Charge balance: 1+ 1- = 0
Monatomic IonsMonatomic Ions
Writing a FormulaWriting a Formula
Write the formula for the ionic compound that will form between Ba2+ and Cl.
Solution:
1. Balance charge with + and – ions
2. Write the positive ion of metal first, and the
negative ion Ba2+ Cl
Cl3. Write the number of ions needed as
subscripts BaCl2
Learning Check Learning Check
Write the correct formula for the compounds containing the following ions:
1. Na+, S2-
a) NaS b) Na2S c) NaS2
2. Al3+, Cl-
a) AlCl3 b) AlCl c) Al3Cl
3. Mg2+, N3-
a) MgN b) Mg2N3 c) Mg3N2
Solution Solution
1. Na+, S2-
b) Na2S
2. Al3+, Cl-
a) AlCl3
3. Mg2+, N3-
c) Mg3N2
Naming CompoundsNaming CompoundsNaming CompoundsNaming Compounds
• 1. Cation first, then anion
• 2. Monatomic cation = name of the element
• Ca2+ = calcium ion
• 3. Monatomic anion = root + -ide• Cl = chloride
• CaCl2 = calcium chloride
Binary Ionic Compounds:Binary Ionic Compounds:
Naming Binary Ionic CompoundsNaming Binary Ionic Compounds
Examples:
NaCl
ZnI2
Al2O3
sodium chloride
zinc iodide
aluminum oxide
Learning Check Learning Check
Complete the names of the following binary compounds:
Na3N sodium ________________
KBr potassium ________________
Al2O3 aluminum ________________
MgS _________________________
Solution Solution
Complete the names of the following binary compounds:
Na3N
KBr
Al2O3
MgS
sodium nitride
potassium bromide
aluminum oxide
magnesium sulfide
Transition MetalsTransition Metals
Elements that can have more than one possible
charge MUST have a Roman Numeral to
indicate the charge on the individual ion.
1+ or 2+ 2+ or 3+
Cu+, Cu2+ Fe2+, Fe3+
copper(I) ion iron(II) ion
copper (II) ion iron(III) ion
Names of Variable IonsNames of Variable Ions
These elements REQUIRE Roman Numerals because they can have more than one possible charge:anything except Group 1A, 2A, Ag, Zn, Cd, and Al
(You should already know the charges on these!)
Or another way to say it is: Transition metals and the metals in groups 4A and
5A (except Ag, Zn, Cd, and Al) require a Roman Numeral.
FeCl3 (Fe3+) iron (III) chlorideCuCl (Cu+ ) copper (I) chlorideSnF4 (Sn4+) tin (IV) fluoridePbCl2 (Pb2+) lead (II) chloride
Fe2S3 (Fe3+)iron (III) sulfide
Examples of Older Names of Cations Examples of Older Names of Cations formed from Transition Metalsformed from Transition Metals
(you do not have to memorize these)(you do not have to memorize these)
Learning Check Learning Check
Complete the names of the following binary
compounds with variable metal ions:
FeBr2 iron (_____) bromide
CuCl copper (_____) chloride
SnO2 ___(_____ ) ______________
Fe2O3 ________________________
Hg2S ________________________
Solution Solution
Complete the names of the following binary
compounds with variable metal ions:
iron ( II ) bromide
copper ( I ) chloride
tin (IV) oxide
iron (III) oxide
mercury (I) sulfide
FeBr2
CuCl
SnO2
Hg2S
FeFe22OO33
NONO33--
nitrate ionnitrate ion
NONO22--
nitrite ionnitrite ion
Polyatomic Polyatomic IonsIons
Polyatomic Polyatomic IonsIons
You can make additional polyatomic ions You can make additional polyatomic ions by adding a Hby adding a H++ to the ion! to the ion!
COCO33 -2-2 is carbonate is carbonate
HCOHCO33–– is hydrogen carbonate is hydrogen carbonate
HH22POPO44–– is dihydrogen phosphate is dihydrogen phosphate
HSOHSO44–– is hydrogen sulfate is hydrogen sulfate
Polyatomic IonsPolyatomic IonsPolyatomic IonsPolyatomic Ions
Ternary Ionic NomenclatureTernary Ionic Nomenclature
Writing Formulas
• Write each ion, cation first. Don’t show charges in the final formula.
• Overall charge must equal zero.• If charges cancel, just write symbols.• If not, use subscripts to balance charges.
• Use parentheses to show more than one of a particular polyatomic ion.
• Use Roman numerals indicate the ion’s charge when needed (stock system)
Ternary Ionic NomenclatureTernary Ionic Nomenclature
Sodium SulfateNa+ and SO4 -2
Na2SO4
Iron (III) hydroxideFe+3 and OH-
Fe(OH)3
Ammonium carbonateNH4
+ and CO3 –2
(NH4)2CO3
Learning Check Learning Check
1. aluminum nitrate
a) AlNO3 b) Al(NO)3 c) Al(NO3)3
2. copper(II) nitrate
a) CuNO3 b) Cu(NO3)2 c) Cu2(NO3)
3. Iron (III) hydroxide
a) FeOH b) Fe3OH c) Fe(OH)3
4. Tin(IV) hydroxide
a) Sn(OH)4 b) Sn(OH)2 c) Sn4(OH)
Solution Solution
1. aluminum nitrate
c) Al(NO3)3
2. copper(II) nitrate
b) Cu(NO3)2
3. Iron (III) hydroxide
c) Fe(OH)3
4. Tin(IV) hydroxide
a) Sn(OH)4
Naming Ternary CompoundsNaming Ternary Compounds
Contains at least 3 elementsThere MUST be at least one polyatomic ion
(it helps to circle the ions)Examples:
NaNO3 Sodium nitrate
K2SO4 Potassium sulfate
Al(HCO3)3 Aluminum bicarbonate
or
Aluminum hydrogen carbonate
Learning Check Learning Check
Match each set with the correct name:
1. Na2CO3 a) magnesium sulfite
MgSO3 b) magnesium sulfate
MgSO4 c) sodium carbonate
2 . Ca(HCO3)2 a) calcium carbonate
CaCO3 b) calcium phosphate
Ca3(PO4)2 c) calcium bicarbonate
Solution Solution
1. Na2CO3
MgSO3
MgSO4
2. Ca(HCO3)2
CaCO3
Ca3(PO4)2
c) sodium carbonatea) magnesium sulfite b) magnesium sulfate
c) calcium bicarbonated) calcium carbonateb) calcium phosphate
Mixed Practice!Mixed Practice!
Name the following:
1. Na2O
2. CaCO3
3. PbS2
4. Sn3N2
5. Cu3PO4
6. HgF2
1. Sodium oxide
2. Calcium carbonate
3. Lead (IV) sulfide
4. Tin (II) nitride
5. Copper (I) phosphate
6. Mercury (II) fluoride
Mixed Up… The Other WayMixed Up… The Other Way
Write the formula:
1. Copper (II) chlorate
2. Calcium nitride
3. Aluminum carbonate
4. Potassium bromide
5. Barium fluoride
6. Cesium hydroxide
Cu(ClO3)2
Ca3N2
Al2(CO3)3
KBr
BaF2
CsOH
Naming Molecular Naming Molecular CompoundsCompounds
CH4 methaneBCl3 boron trichloride
CO2 Carbon dioxide
All are formed from two or more nonmetals.
Ionic compounds generally involve a metal and nonmetal (NaCl)
Molecular (Covalent) NomenclatureMolecular (Covalent) Nomenclaturefor two for two nonnonmetalsmetals
• Prefix System (binary compounds)
1. Less electronegative atom comes first.
2. Add prefixes to indicate # of atoms. Omit mono- prefix on the FIRST element. Mono- is OPTIONAL on the SECOND element (in this class, it’s NOT optional!).
3. Change the ending of the second element to -ide.
PREFIXmono-di-tri-tetra-penta-hexa-hepta-octa-nona-deca-
NUMBER12345678910
Molecular Nomenclature PrefixesMolecular Nomenclature Prefixes
• CCl4
• N2O
• SF6
• carbon tetrachloride
• dinitrogen monoxide
• sulfur hexafluoride
Molecular Nomenclature: ExamplesMolecular Nomenclature: Examples
• arsenic trichloride
• dinitrogen pentoxide
• tetraphosphorus decoxide
• AsCl3
• N2O5
• P4O10
More Molecular ExamplesMore Molecular Examples
Learning Check Learning Check
Fill in the blanks to complete the following names of covalent compounds.
CO carbon ______oxide
CO2 carbon _______________
PCl3 phosphorus _______chloride
CCl4 carbon ________chloride
N2O _____nitrogen _____oxide
Solution Solution
CO carbon monoxide
CO2 carbon dioxide
PCl3 phosphorus trichloride
CCl4 carbon tetrachloride
N2O dinitrogen monoxide
Learning Check Learning Check
1. P2O5 a) phosphorus oxide
b) phosphorus pentoxide
c) diphosphorus pentoxide
2. Cl2O7 a) dichlorine heptoxide
b) dichlorine oxide
c) chlorine heptoxide
3. Cl2 a) chlorine
b) dichlorine
c) dichloride
Solution Solution
1. P2O5
2. Cl2O7
3. Cl2
c) diphosphorus pentoxide
a) dichlorine heptoxide
a) chlorine
Overall strategy for naming chemical Overall strategy for naming chemical compounds.compounds.
A flow chart for naming binary compounds.A flow chart for naming binary compounds.
Mixed Review Mixed Review
Name the following compounds:
1. CaOa) calcium oxide b) calcium(I) oxidec) calcium (II) oxide
2. SnCl4
a) tin tetrachloride b) tin(II) chloride
c) tin(IV) chloride
3. N2O3
a) nitrogen oxide b) dinitrogen trioxidec) nitrogen trioxide
Solution Solution
Name the following compounds:
1. CaO
2. SnCl4
3. N2O3
a) calcium oxide
c) tin(IV) chloride
b) Dinitrogen trioxide
Mixed PracticeMixed Practice
1. Dinitrogen monoxide
2. Potassium sulfide
3. Copper (II) nitrate
4. Dichlorine heptoxide
5. Chromium (III) sulfate
6. Iron (III) sulfite
7. Calcium oxide
8. Barium carbonate
9. Iodine monochloride
1. N2O
2. K2S
3. Cu(NO3)2
4. Cl2O7
5. Cr2(SO4)3
6. Fe2(SO3)3
7. CaO
8. BaCO3
9. ICl
Mixed PracticeMixed Practice
1.1. BaIBaI22
2.2. PP44SS33
3.3. Ca(OH)Ca(OH)22
4.4. FeCOFeCO33
5.5. NaNa22CrCr22OO77
6.6. II22OO55
7.7. Cu(ClOCu(ClO44))22
8.8. CSCS22
9.9. BB22ClCl44
1.1. Barium iodideBarium iodide
2.2. Tetraphosphorus trisulfideTetraphosphorus trisulfide
3.3. Calcium hydroxideCalcium hydroxide
4.4. Iron (II) carbonateIron (II) carbonate
5.5. Sodium dichromateSodium dichromate
6.6. Diiodine pentoxideDiiodine pentoxide
7.7. Copper (II) perchlorateCopper (II) perchlorate
8.8. Carbon disulfideCarbon disulfide
9.9. Diboron tetrachlorideDiboron tetrachloride
Acid NomenclatureAcid Nomenclature
• AcidsAcids
• Compounds that form HCompounds that form H++ in water. in water.
• Formulas usually begin with ‘H’.Formulas usually begin with ‘H’.
• In order to be an acid instead of a gas, binary In order to be an acid instead of a gas, binary
acids must be aqueous (dissolved in water)acids must be aqueous (dissolved in water)
• Ternary acids are ALL aqueousTernary acids are ALL aqueous
• Examples:Examples:
• HCl HCl (aq)(aq) – hydrochloric acid – hydrochloric acid
• HNOHNO33 – nitric acid – nitric acid
• HH22SOSO44 – sulfuric acid – sulfuric acid
Anion Ending Acid Name
-ide hydro-(stem)-ic acid
-ate (stem)-ic acid
-ite (stem)-ous acid
Acid NomenclatureAcid Nomenclature
Binary Binary
Ternary Ternary
An easy way to remember which goes with which…An easy way to remember which goes with which…
““In the cafeteria, you In the cafeteria, you ATEATE something something ICICky”ky”
Acid Nomenclature FlowchartAcid Nomenclature Flowchart
h yd ro - p re fix-ic en d in g
2 e lem en ts
-a te en d in gb ecom es-ic en d in g
-ite en d in gb ecom es
-o u s en d in g
n o h yd ro - p re fix
3 e lem en ts
AC ID Ss ta rt w ith 'H '
• HBr HBr (aq)(aq)
• HH22COCO33
• HH22SOSO33
• 2 elements, 2 elements, --ideide
• 3 elements, 3 elements, -ate-ate
• 3 elements, 3 elements, -ite-ite
hydrohydrobromic acidbromic acid
carboncarbonicic acid acid
sulfursulfurousous acid acid
Acid NomenclatureAcid Nomenclature
• hydrofluoric acidhydrofluoric acid
• sulfuric acidsulfuric acid
• nitrous acidnitrous acid
• 2 elements2 elements
• 3 elements, 3 elements, -ic-ic
• 3 elements, 3 elements, -ous-ous
HF HF (aq)(aq)
HH22SOSO44
HNOHNO22
Acid NomenclatureAcid Nomenclature
HH++ F- F-
HH++ SO SO442-2-
HH++ NO NO22--
Name ‘Em!Name ‘Em!
• HI HI (aq)(aq)
• HClHCl
• HH22SOSO33
• HNOHNO33
• HIOHIO44
Hydroiodic acidHydroiodic acid
Hydrogen chloride (not aq!)Hydrogen chloride (not aq!)
Sulfurous acidSulfurous acid
Nitric acidNitric acid
Periodic acidPeriodic acid
Write the Formula!Write the Formula!
• Hydrobromic acidHydrobromic acid
• Nitrous acidNitrous acid
• Carbonic acidCarbonic acid
• Phosphoric acidPhosphoric acid
• Hydrotelluric acidHydrotelluric acid
HBr HBr (aq)(aq)
HNOHNO22
HH22COCO33
HH33POPO44
HH22Te Te (aq)(aq)
Nomenclature Summary Flowchart
Now You Should Be Able To…Now You Should Be Able To…Identify common elements and compounds using scientific
nomenclature.Use:
• Common system• Stock system,• Prefix system,• IUPAC nomenclature• acid nomenclature
WITH:• common monatomic ion,• common polyatomic ions
AND:Binary compounds
• Ionic• Molecular• Acids
Ternary compounds• Ionic• Acids
Now You Should Be Able To…Now You Should Be Able To…Demonstrate (students performing) theuse of symbols, formulas, and equationsin describing interactions of matter suchas chemical and nuclear reactions.
Write formulas and equations with:• Words only• Formula equations• Symbols in equations like, aq,
s, l, g, etc.
Use Empirical and molecular formulas
Now it’s Study TimeNow it’s Study Time
DONEDONE