CHEMISTRY MRS. GALL

INKSTER HIGH SCHOOL

Building Molecules

Today’s Lesson Steps

Silent Do Now (Label Paper with today’s problems listed on the board)

Discuss Do NowDiscuss Today’s ExpectationsFrontal Teaching:

Build A Molecule: Simulation Quiz Naming Ionic and Covalent/ Molecular Compounds

Individual and Small Group PracticeHomework

Build A Molecule: Simulation Quiz

1. Load the simulator2. Run the simulation3. Open the “Collect Multiple” screen4. Complete the 4- part quiz5. Show Mrs. Gall (or chosen student

assistant) to earn credit

www.phet.colorado.edu OR…

www.google.comPhet colorado chemistry simulation

Lab Credit: Due Today

Complete all four of the “Molecule Collection” Tasks on the right side of the screen for 4 points credit: LAB.

Due in class today.

You must reset the section before allowing another student to complete the tasks. You must complete the tasks on your own, but you may have guidance from other informed people.

“Tech Tuesday”: 12 problems

Page 183 #19 a b c d : Name the compoundsPage 184 #20 a b c d: Write formulasPage 207 #9 a b c d: Name the compounds

Holt Chemistry textbook (black cover, heated test tube graphic on front)

Online Resources for naming compounds

http://misterguch.brinkster.net/ionic.htmlhttp://misterguch.brinkster.net/covalentcomp

ounds.htmlhttp://chemistry.about.com/od/nomenclature/

a/nomenclature-ionic-compounds.htmhttp://chemistry.about.com/od/nomenclature/

a/covalent-compound-nomenclature.htmOF COURSE, YOU CAN “GOOGLE IT”:

NAMING IONIC COMPOUNDS NAMING COVALENT COMPOUNDS

Rationale: Why are we “skipping around” in the book?

1. We are working on both types of compounds at once, because I’ve found that it is more useful.

2. We are naming compounds before we discuss the ways and reasons things bond because: A. We’ve already covered those concepts; the review may

feel boring B. Knowing you can “do this”- the “plug and chug” sort of

just” go through a process” tasks- you gain confidence, experience, and knowledge. The reasons make more sense when you know what you’re expected to do.

Textbook Resources: Chapters 5 and 6

Chapter 5, section 3: pages 176 – 180Chapter 6, section 2: pages 206 – 207

Naming ionic compounds Pg.183 #19

A. Cu3(PO4)2

Look at page 178. PO4 is PHOSPHATE. It has a -3 charge.

Cu is copper. It is on the Periodic Table!Since the molecule has 2 phosphates, we have a -6

charge there. The copper must have a total charge of +6 to

make a neutral molecule.Since there are 3 of these, each one carries a +2

charge.Name it: copper (II) phospate

#19 a: Name the ionic compound Cu3(PO4)2

#19 a: Name the ionic compound Cu3(PO4)2

#19 a: Name the ionic compound Cu3(PO4)2

#19 b

#19 b: Name the ionic compound Fe(NO3)3

This compound contains Fe, Iron. All metals are capable of carrying different amounts of charge, so, again, we will need to determine the amount of charge on each of these iron atoms and include that in the name of the molecule.

The molecule name is partly: iron(?) --?—Let’s check page 178 for the name for NO3

#19 b: Name the ionic compound Fe(NO3)3

19B. Fe(NO3)3

iron (III) nitrate

#19 b: Name the ionic compound Fe(NO3)3

Naming it.Fe is IRONIts charge is +3NO3 is NITRATENo need to show its charge.

Iron (III) nitrate

#19 b: Name the ionic compound Fe(NO3)3

#19 b: Name the ionic compound Fe(NO3)3

#19 b: Name the ionic compound Fe(NO3)3

19. c. Name the compound: Cu2O

Cu is copper.There are 2 of them. How do I know?There is 1 oxygen atom. How do I know?Oxygen is born with 6 valence electrons. It “wants” to steal 2 in order to have a full

octet.It will steal 2 electrons and have a -2 charge.Two coppers and One (-2) charged Oxygen…Each copper must be +1.Copper (I) oxide

19. d. Name the compound: CuO

Cu is copper.There is 1 of them. How do I know?There is 1 oxygen atom. How do I know?Oxygen is born with 6 valence electrons. It “wants” to steal 2 in order to have a full octet.It will steal 2 electrons and have a -2 charge.One copper atom and One (-2) charged Oxygen

atom…The copper atom must have a +2 charge.Copper (II) oxide

20.a. Give the chemical formula for: lithium sulfate

Lithium has the symbol Li. Found in column one, it is “born” with 1 valence electron. It will lose this one electron to become more stable (its outer shell will be the full shell below that one); its charge will be +1 as a result.

Sulfate is found on page 178. Its formula is SO4 . It carries a -2 charge.

In order to create a NEUTRAL molecule, we will combine TWO lithium atoms with ONE sulfate ion.

Li2SO4

20a. Lithium sulfate

Lithium is LiSulfate is (see page 178) SO4 (-2)

Li SO4

20.b. Give the chemical formula for: strontium nitrate

Strontium has the symbol Sr. Found in column two, it is “born” with 2 valence electrons. It will lose those two electrons to become more stable (its outer shell we be the full shell below those two); its charge will be +2 as a result.

Nitrate is found on page 178. Its formula is NO3 . It carries a -1 charge.

In order to create a NEUTRAL molecule, we will combine ONE strontium atom with TWO nitrate ions.

Sr(NO3)2

20.b. strontium nitrate

Sr NO3

20.c. Give the chemical formula for: ammonium acetate

Ammonium is NH4; see page 178 for the formula.

It carries a +1 charge.Acetate is C2H3O2; see page 178 for the

formula.It carries a -1 charge.

+1 (ammonium) and -1 (acetate) can bond to form one NEUTRAL ammonium acetate molecule

NH4C2H3O2

20.d. Give the chemical formula for: titanium (III) sulfate

In our science lab, we can combine a LOT of Titanium ions and a LOT of Sulfate ions in one big beaker.

20.d. Give the chemical formula for: titanium (III) sulfate

titanium (III) sulfate

Titanium is Ti and carries a +3 charge.We know it has a +3 charge, because the (III)

shows that.

20.d. Give the chemical formula for: titanium (III) sulfate

titanium (III) sulfate

Sulfate is found on page 178. Its formula is SO4 . It carries a -2 charge.

20.d. Give the chemical formula for: titanium (III) sulfate

Ions with a 3+ charge and ions with a 2- charge can be combined into NEUTRAL groups. To make a neutral titanium (III) sulfate molecule, we will combine TWO Ti3+ ions and THREE SO4 2- ions.

20.d. Give the chemical formula for: titanium (III) sulfate

Titanium is Ti and carries a +3 charge.We know it has a +3 charge, because the (III)

shows that.Sulfate is found on page 178. Its formula is

SO4 . It carries a -2 charge.In order to create a NEUTRAL molecule, we

will combine TWO titanium atoms with THREE sulfate ions.

Ti2(SO4)3

Page 207: #9abcd

9a. SnI4: tin tetraiodide9b. N2O3:dinitrogen trioxide9c. PCl3: phosphorus trichloride9d. CSe2: carbon diselenide