1. Concept Review
Chapter 9

2. potassium chloride + silver nitrate  potassium nitrate + silver chloride
Look up each part:
potassium
chloride
silver
nitrate
Symbol
K1+
Cl1-
Ag1+
NO31- - + + - + - + -
ALL THE FORMULAS ARE
BALANCED!
KCl + AgNO3  KNO3 + AgCl
IS THE EQUATION BALANCED?

3. Aluminum hydroxide + sodium nitrate  aluminum nitrate + sodium hydroxide.
OH1-
Na1+
NO31-
Now all the compounds are balanced!
Balance the equation. 1+ 1- 3+ 1- 1+ 3+ 1- 1-
( )3
Al OH Na NO3  Al NO NaOH 3
( )3 3
1 Al, 3OH, 3 Na, 3 NO3
REACTANTS
PRODUCTS

4. Iron metal + copper(II) sulfate  iron (II) sulfate + copper metal
Fe (elements have no charge)
Cu2+
SO42-
Fe2+
Cu (elements have no charge)
Fe CuSO4  FeSO Cu

5. Aluminum metal + copper (II) chloride  aluminum chloride + copper metal
aluminum ion
Al (elements have no charge)
Cu2+
Cl1-
Al3+ 2+ 1- 3+ 1- 2
Al Cu Cl  Al Cl Cu 3 2 3 2 3
Elements have no charge!

6. potassium bromide  potassium metal and bromine
potassium ion
bromide
potassium metal
bromine gas
K1+
Br1-
K (elements have no charge)
Br2 2
KBr  K + Br2 2
Don’t forget about the HONClBrIF “club”
H2 O2 N2 Cl2 Br2 I2 F2

7. Predicting Products of Chemical Reactions.
1. aluminum sulfate + calcium phosphate 
Aluminum
Sulfate +
Calcium
phosphate
Aluminum
phosphate +
Calcium
Sulfate
3( )2 2
Al3+PO43-
Ca2+PO43-
Al3+ SO42- +
2 ( )3 3
Ca2+SO42- +
Balanced!

8. Sodium chlorate   Na ClO3 Na Cl O2 Sodium Na1+ chlorate ClO31- +
Sodium chloride
and oxygen gas
are formed.