1. 2/8 Opener
What is the chemical equation for titanium (III) oxide?

2. Types of Reactions
Synthesis reactions
Decomposition reactions
Single displacement/replacement reactions
Double displacement/replacement reactions
Combustion reactions
By the end of these notes you should be able to identify each type.

3. Reactant/Product States
s: solid
g: gas
l:liquid
aq: aqueous (mixed w/ water)

4. In your own words define Synthesis.
Example C + O2 O C +  O C
General: A + B  AB
How to Identify:
Two + molecules come together to make one (or fewer) product(s)

5. In your own words define decomposition.
Example: NaCl  Cl Na Cl + Na
General: AB  A + B
How to Identify:
One molecule breaks into to two or more products.

6. Ex. Decomposition Reaction

7. Single Replacement (SR) Reactions
Definition
When 1 atom replaces another atom.
How to Identify
Look at the reactants! There will be 1 lone element or diatomic molecule interacting with a compound.
Ag + MgO  Ag2O + Mg
Lone Element
Compound

8. Single Replacement (SR) Reactions
How to Predict Products
Identify the charges for the reactant ions.
The lone element/molecule will replace that atom from the compound that has the same types of charge: cation replaces a cation; anion replaces an anion.
Write the correct formulas for the products. Then balance the equation.
2 Ag + 1 MgO  1 Ag2O + 1 Mg
Ions: Ag+1 Mg+2 O-2 1 3 2
The silver ion will now bond with the oxygen ion

9. Single Replacement Reactions
Predict the products and balance the following single replacement reaction equation:
Zn(s) HCl(aq) 

10. Ex. Single Replacement Reaction

11. Double Replacement (DR) Reactions
Definition
When 2 atoms replace each other.
How to Identify
Look at the reactants! There will be 2 compound interacting.
NaC2H3O2 + Al2O3  Na2O + Al(C2H3O2)3
Both reactants are compounds

12. Double Replacement (DR) Reactions
How to Predict Products
Identify the charges for the reactant ions.
The anion from the first compound will switch places with the anion in the second compound.
Write the correct formulas for the products. Then balance the equation.
6 NaC2H3O Al2O3  3 Na2O + 2 Al(C2H3O2)3
Ions: Na+1 C2H3O2-1 Al+3 O-2
The sodium ion will now bond with the oxygen ion
The acetate ion will now bond with the aluminum ion 1 2 3

15. Practice Predict the products. HCl(aq) + AgNO3(aq) 
CaCl2(aq) + Na3PO4(aq) 
Pb(NO3)2(aq) + BaCl2(aq) 
FeCl3(aq) + NaOH(aq) 
H2SO4(aq) + NaOH(aq) 
KOH(aq) + CuSO4(aq) 

16. State the reaction type, predict products, and balance Mg + CuSO4 
2/28 Opener
State the reaction type, predict products, and balance Mg + CuSO4 

17. Combustion (Comb) Reactions
Definition
When a hydrocarbon interacts with oxygen gas to produce carbon dioxide and water.
How to Identify
Look at the reactants! There will be a carbon compound (hydrocarbon) and oxygen gas.
CH4 + O2  CO2 + H2O
Oxygen gas
Hydrocarbon
(compound that contains hydrogen & carbon)

18. Combustion (Comb) Reactions
How to Predict Products
Identify the reactants as a carbon compound and oxygen gas.
Products are always carbon dioxide and water.
Then balance the equation.
Carbon dioxide
1 CH4 + 2 O2  1 CO2 + 2 H2O
Water
Oxygen gas
Hydrocarbon
(compound that contains hydrogen & carbon)

19. Combustion
Example
C5H O2  CO2 + H2O
Write the products and balance the following combustion reaction:
C10H O2  8 5 6

20. Mixed Practice State the type, predict the products, & balance.
BaCl2 + H2SO4 
C6H12 + O2 
Zn + CuSO4 
4. Cs + Br2 
5. FeCO3 