1. Types of Chemical Reactions

2. SYNTHESIS Reaction 3H2 + N2  2NH3
2 or more reactants combine to build a single product
3H2 + N2  2NH3

3. 2H2O  2H2 + O2 DECOMPOSITION Rxn
A compound is broken down into 2 or more simpler substances
2H2O  2H2 + O2

4. SINGLE REPLACEMENT Rxn
One of the reactants is a single element. It becomes part of a compound as a product.
Mg + CaBr2  Ca + MgBr2

5. DOUBLE REPLACEMENT LiCl + KBr  LiBr + KCl
TWO elements switch places during the process of the reaction.
LiCl + KBr  LiBr + KCl

6. Combustion Oxygen is always a reactant CO2 and H2O are always products
_______ + O2  CO2 + H2O

7. Practice 2Al + 3CuSO4  Al2(SO4)3 + 3Cu C12H22O11  11H2O + 12C
KCl + AgNO3  KNO3 + AgCl
CH4 + 2O2  CO2 + 2H2O

8. Practice 2Al + 3CuSO4  Al2(SO4)3 + 3Cu Single Replacement Reaction
C12H22O11  11H2O + 12C
decomposition
KCl + AgNO3  KNO3 + AgCl
Double replacement reaction
CH4 + 2O2  CO2 + 2H2O
combustion

9. The LOCOM states Balancing Equations
atoms are not created or destroyed during a chemical reaction
atoms are rearranged to form new substances

10. # atoms on reactant = # atoms on products

11. Practice Balancing Mg + Al(SO4)3  MgSO4 + Al HINT
if the SAME polyatomic ion is present
on both sides of the equation,
count it together

12. ANSWER
3Mg Al(SO4)3  3MgSO Al

13. Step 3 take inventory of atoms
add atoms to the side that need them & immediately recount your inventory
Step 3
repeat Steps 1 & 2 until the equation is balanced with reduced coefficients

14. Practice
CH O2  CO H2O
ANSWER
CH O2  CO H2O

15. THE END