Concept Review

Chapter 9

potassium chloride + silver nitrate potassium nitrate + silver chloride

• Look up each part:

• potassium• chloride• silver• nitrate

• Symbol

• K1+

• Cl1-

• Ag1+

• NO31-

KCl + AgNO3 KNO3 + AgCl

+ - + + +- - ALL THE FORMULAS AREBALANCED!

IS THE EQUATION BALANCED?

-

Aluminum hydroxide + sodium nitrate aluminum nitrate + sodium hydroxide.

Al3+

OH1-

Na1+

NO31-

Aluminumhydroxidesodiumnitrate

Al OH + Na NO3 Al NO3 + NaOH3+

3+1-

1-1-

1-1+

1+

( )3 ( )3

Now all the compounds are balanced!Balance the equation.

33

1 Al, 3OH, 3 Na, 3 NO3

REACTANTS PRODUCTS

Iron metal + copper(II) sulfate iron (II) sulfate + copper metal

• iron metal• copper (II)• sulfate• iron (II)• copper metal

• Fe (elements have no charge)• Cu2+

• SO42-

• Fe2+

• Cu (elements have no charge)

Fe + CuSO4 FeSO4 + Cu

Aluminum metal + copper (II) chloride aluminum chloride + copper metal

• Aluminum metal• copper (II)• chloride• aluminum ion

• Al (elements have no charge)

• Cu2+

• Cl1-

• Al3+

Al + Cu Cl Al Cl + Cu

2+ 1-

2

3+ 1-

3232 3

Elements have no charge!

potassium bromide potassium metal and bromine

• potassium ion• bromide• potassium metal• bromine gas

• K1+

• Br1-

• K (elements have no charge)

• Br2

KBr K + Br22 2

Don’t forget about the HONClBrIF “club”H2 O2 N2 Cl2 Br2 I2 F2

Predicting Products of Chemical Reactions.

1. aluminum sulfate + calcium phosphate

AluminumSulfate + Calcium phosphate

Aluminum phosphate

+ Calcium Sulfate

Al3+ SO42-

2 ( )3+ Ca2+PO4

3- Al3+PO43-

+ Ca2+SO42-

3( )2

3

2

Balanced!

Sodium chlorate

• Sodium Na1+

• chlorate ClO31-

Na ClO3 Na

1+

Cl

1-

+ O232 2

Sodium chlorideand oxygen gasare formed.