1. Wednesday, January 14th, 2014
HW: Week 18 Agenda Problems #1,5,6 Objective: We will write formulae and apply naming conventions to ionic compounds with polyatomic ions Catalyst: A. Reaction temperature B. Addition of NaCl C. Addition of Fe D. Surface area of Mg
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
***Table of Contents
1/ Notes: Ionic Compounds w/Polyatomic Ions

2. Announcements Tutoring this week: no more tutoring
Missed Unit 4 Exam?? Time for make ups ended YESTERDAY

3. Semester Exams
7 days left!!!

4. Exam Schedule

5. Catalyst/Announcements Homework Check
Agenda
Catalyst/Announcements
Homework Check
Finish Notes from Yesterday (1st period)
Notes: Ionic Compounds with Polyatomic Ions

6. Agenda Problems

7. Ionic Compounds with Transition Metals
101

8. Writing Chemical Formulae for ionic compounds with type II metals
1.) Write the cation and anion with their charges.
For example: Iron (III) chloride
Fe3+ Cl1-

9. Writing Chemical Formulae for ionic compounds with type II metals
2.) Add cations and anions until the charges equal zero. For example: Iron (III) chloride Fe3+ Cl1- Cl1-

10. Writing Chemical Formulae for ionic compounds with type II metals
3.) Total the number of cations and anions to determine the subscripts in the formula. For example: Iron (III) chloride Fe3+ Cl1- Cl1- Iron (III) chloride = FeCl3

11. Whiteboard Practice Write the chemical formula of iron (II) chloride.
FeCl2

12. Whiteboard Practice
Write the chemical formula of chromium (III) oxide.
Cr2O3

13. Whiteboard Practice
Write the chemical formula of tin (II) oxide.
SnO

14. Whiteboard Practice
Write the chemical formula of tin (IV) oxide.
SnO2

15. Whiteboard Practice
What information is told by the roman numeral in the name of an ionic compound?
The charge on an atom that has the potential to form multiple ions.

16. Notes: Ionic Compounds w/Polyatomic Ions
Pg.

17. Polyatomic Ions A polyatomic ion is a group of atoms.
has an overall ionic charge.
Some examples of polyatomic ions are
NH4+ ammonium OH− hydroxide
NO3− nitrate NO2− nitrite
CO32− carbonate PO43− phosphate
HCO3− hydrogen carbonate
(bicarbonate)

18. Some Compounds with Polyatomic Ions
Copyright © by Pearson Education, Inc.

19. Polyatomic Ions to Memorize
Name
Formula
Hydronium
H3O+
Sulfite
SO32-
Ammonium
NH4+
Nitrate
NO3-
Hydroxide
OH-
Nitrite
NO2-
Phosphate
PO43-
Chlorate
ClO3-
Peroxide
O22-
Chlorite
ClO2-
Carbonate
CO32-
Acetate
C2H3O2- or CH3COO-
Sulfate
SO42-
Must memorize ions by Wednesday’s quiz!!!!

20. Some Names of Polyatomic Ions
The names of common polyatomic anions
end in ate.
NO3− nitrate PO43− phosphate
with one oxygen less end in ite.
NO2− nitrite PO33− phosphite

21. O S O Polyatomic Ions Why do polyatomic ions have an overall charge? O
The polyatomic ion is drawn with brackets to show the ion is ONE unit O
O S O 2-
The charge of the polyatomic unit is written outside the bracket
The charge is due to the ion having extra electrons
Sulfate has 2 extra electrons resulting in a charge of -2

22. Naming Compounds with Polyatomic Ions
The positive ion is named first, followed by the name of the polyatomic ion.
NaNO3 sodium nitrate
K2SO4 potassium sulfate
Fe(HCO3)3 iron(III) bicarbonate
or iron(III) hydrogen carbonate
(NH4)3PO3 ammonium phosphite

23. Guide for Naming Polyatomic Ions
Identify the cation and anion in the compound
Name the cation, using a ROMAN NUMERAL, if needed.
Name the polyatomic ion WITHOUT making any changes to the name.
Write the name of the compound, cation first, anion last.

24. Example Problems Name the following compounds: Na2SO4 Mg(OH)2 NH4Cl
Sodium Sulfate
Mg(OH)2
Magnesium Hydroxide
NH4Cl
Ammonium Chloride
Fe2(SO3)3
Iron (III) Sulfite

25. Whiteboard Practice Only write the problem given on your board.
You will lose privileges and points for not following instructions.

26. Whiteboard Practice Match each formula with the correct name.
A. MgS 1) magnesium sulfite
MgSO3 2) magnesium sulfate
MgSO4 3) magnesium sulfide
B. Ca(ClO3) ) calcium chlorate
CaCl2 2) calcium chlorite
Ca(ClO2) ) calcium chloride
Cu(NO2) ) Copper (II) Oxide
CuO ) Copper (II) Nitrite
Fe2(SO4) ) Iron (III) Sulfate

27. Solution Match each formula with the correct name.
A. MgS 3) magnesium sulfide
MgSO3 1) magnesium sulfite
MgSO4 2) magnesium sulfate
B. Ca(ClO3)2 1) calcium chlorate
CaCl2 3) calcium chloride
Ca(ClO2)2 2) calcium chlorite
Cu(NO2) ) Copper (II) Nitrite
CuO ) Copper (II) Oxide
Fe2(SO4) ) Iron (III) Sulfate

28. Whiteboard Practice Name each of the following compounds: A. Mg(NO3)2
B. Cu(ClO3)2
C. PbO2
D. Fe2(SO4)3
E. Ba3(PO4)2

29. Solution Name each of the following compounds:
A. Mg(NO3)2 magnesium nitrate
B. Cu(ClO3)2 copper(II) chlorate
C. PbO2 lead(IV) oxide
D. Fe2(SO4)3 iron(III) sulfate
E. Ba3(PO3)2 barium phosphite

30. Writing Formulas with Polyatomic Ions
The formula of an ionic compound
containing a polyatomic ion must have a charge balance that equals zero (0).
Na+ and NO3− -> NaNO3 (net charge of zero)
with two or more polyatomic ions, the polyatomic ion MUST be in parentheses.
Mg2+ and NO3− -> Mg(NO3)2
NO3-
Net charge of zero!!

31. Whiteboard Practice Select the correct formula for each.
A. aluminum nitrate
1) AlNO ) Al(NO) ) Al(NO3)3
B. copper(II) nitrate
1) CuNO3 2) Cu(NO3)2 3) Cu2(NO3)
C. iron(III) hydroxide
1) FeOH 2) Fe3OH 3) Fe(OH)3
D. tin(IV) hydroxide
1) Sn(OH)4 2) Sn(OH) ) Sn4(OH)

32. Solution Select the correct formula for each.
A. aluminum nitrate 3) Al(NO3)3
B. copper(II) nitrate ) Cu(NO3)2
C. iron(III) hydroxide 3) Fe(OH)3
D. tin(IV) hydroxide ) Sn(OH)4

33. Whiteboard Practice Write the correct formula for each.
A. magnesium nitrate
B. calcium carbonate
C. sodium phosphate
D. iron(III) oxide
E. iron(II) nitrite

34. Solution Write the correct formula for each.
A. magnesium nitrate Mg(NO3)2
B. calcium carbonate CaCO3
C. sodium phosphate Na3PO4
D. iron(III) oxide Fe2O3
E. iron(II) nitrite Fe(NO2)2

35. Whiteboard Practice Name the following compounds: A. Ca3(PO4)2
B. FeBr3
C. Al2S3
D. Zn(NO2)2
E. NH4OH

36. Solution Name the following compounds:
A. Ca3(PO4)2 Ca2+ PO43− calcium phosphate
B. FeBr3 Fe3+ Br − iron(III) bromide
C. Al2S3 Al3+ S2− aluminum sulfide
D. Zn(NO2)2 Zn2+ NO2− zinc nitrite
E. NH4OH NH4+ OH ammonium hydroxide

37. Whiteboard Practice Write the formulas for the following:
A. calcium nitrate
B. iron(II) hydroxide
C. aluminum carbonate
D. copper(II) bromide
E. lithium phosphate

38. Solution Write the formulas for the following:
A. calcium nitrate Ca2+, NO3− Ca(NO3)2
B. iron(II) hydroxide Fe2+, OH− Fe(OH)2
C. aluminum carbonate Al3+, CO32− Al2(CO3)3
D. copper(II) bromide Cu2+, Br− CuBr2
E. lithium phosphate Li+, PO43− Li3PO4