1. 5 Types of Chemical Reactions
Matching Cards
Graphic Organizer
Worksheet

2. 5 types of chemical equations
Why do we categorize?
To break large groups down into smaller groups to make them easier to understand
To make differences and similarities more clear

3. Type 1: SYNTHESIS
Definition: Two or more reactants combine to form one product
Key sign: One product
General Structure: A + B  C
Examples:
#4: CO + O2  CO3
#2: SO2 + O2  SO4

4. Type 2: DECOMPOSITION
Definition: One reactant breaks down into two or more products
Key sign: One reactant
General Structure: A  B + C
Examples:
#5: H2CO3  CO2 + H2O
#10: NCl3  N2 + Cl2

5. Type 3: SINGLE REPLACEMENT
Definition: A single element replaces another element in a compound
Key sign: One single element and a compound on both sides of the equation
General Structure: AB + C  AC + B
Examples:
#13: H2SO4 + Ca  CaSO4 + H2
#14: Li + H2O  LiOH + H2

6. Type 4: DOUBLE REPLACEMENT
Definition: Two ions replace each other to form two different compounds
Key sign: Two compounds on both sides of the equation
General Structure: AB + CD  AD + CB
Examples:
#3: CaCl2 + K3PO4  Ca3(PO4)2 + KCl
#17: Al(SO4)3 + Ca(OH)2  Al(OH)3 + CaSO4

7. Type 5: COMBUSTION
Definition: A chemical burns in oxygen to product light/heat
Key sign: Oxygen is a reactant, carbon dioxide and water are products (or vice versa)
General Structure: A + O2  CO2 + H2O
Examples:
#16: C10H22 + O2  CO2 + H2O
#19: CH4 + O2  CO2 + H2O

8. Categories (15 min)
Organize the 19 chemical equations into the FIVE types with your partners
# of products
# of reactants
Elements vs. compounds
Similar reactants and products
On one separate sheet of paper with all of your group members names on it, write down the equations in your five groups

9. Classifying Reactions
Copy down the following reactions on a SEPARATE sheet of paper and then classify the type of reaction and explain your answer.
C3H8 + O2  CO2 + H2O
FeCl3 + NaOH  Fe(OH)3 + NaCl
Ag2O  Ag + O2
K + MgBr2  KBr + Mg
H2 + O2  H2O
NaCl + F2  NaF + Cl2