1. Classifying Reactions

2. 5 Types of Reactions Synthesis Decomposition Single-replacement
Double-replacement
Combustion

3. Synthesis Two Reactants combine to make One Product Examples: Products
A + B  AB
Mg + Cl2 
MgCl2
Iron reacts with sulfur to produce …
iron (III) sulfide 3 2
Fe S 
Fe2S3

4. Decomposition One Reactant breaks down into Two Products Examples:
Reactants
Products
AB 
A + B
CaO + CO2
CaCO3 
Mercury (II) oxide reacts to form …
mercury and oxygen 2
HgO  2
Hg + O2

5. Single-replacement Single metal swaps with the compound’s metal
Examples:
Reactants
Products
B + AC
A + BC 
Mg + Zn(NO3)2 
Mg(NO3)2 + Zn
Iron (III) reacts with copper (II) sulfate to form …
iron (III) sulfate and copper 3 3 2
Fe CuSO4 
Fe2(SO4) Cu

6. Double-replacement Both metals switch Examples: Reactants Products
AB + CD 
CB + AD
K2CO3 + BaCl2 
2KCl + BaCO3
Sodium sulfide reacts with cadmium (II) nitrate to produce …
sodium nitrate and cadmium (II) sulfide
Na2S + Cd(NO3)2 
CdS + NaNO3 2

7. Combustion
Hydrocarbon and Oxygen React to form Carbon Dioxide and Water
Examples:
Products
Reactants
CH O2 
CO2 + H2O
C6H6 reacts with air to produce . . .
carbon dioxide and water 2
C6H O2  15 12
CO H2O 6