1. Types of Reactions You need to be able to identify each type.
Synthesis reactions
Decomposition reactions
Single displacement reactions
Double displacement reactions
You need to be able to identify each type.

2. 1. Synthesis
Example C + O2 O C + → O C
General: A + B → AB

3. Ex. Synthesis Reaction

4. Synthesis = join together
Predict the products.
Na(s) + Cl2(g) →
Mg(s) + F2(g) →
Al(s) + F2(g) → 2 2
NaCl(s)
MgF2(s) 2 3 2
AlF3(s)
Synthesis = join together

5. 2. Decomposition
Example: NaCl → Cl Na Cl + Na
General: AB → A + B

6. Ex. Decomposition Reaction

7. Decomposition = split apart
Predict the products.
HgO →
2KClO3 → 2
Hg2 + O2
2KCl + 3O2
Decomposition = split apart

8. 3. Single Displacement General: AB + C → AC + B Example: Zn + CuCl2 →

9. Ex. Single Replacement Reaction

10. Single Replacement Reactions
Predict the products.
Cl2 + 2NaBr →
2NaCl + Br2 C A B A C B
2HgO + Cl2 →
2HgCl + O2

11. 4. Double Replacement General: AB + CD → AD + CB Example: MgO + CaS →

12. Double Replacement Reactions
Predict the products.
CuCl2 + H2S →
CuS + 2HCl
BaCl2 + Na2SO4 →
2NaCl + BaSO4

13. Synthesis Decomposition Single Replacement Double Replacement
join together
A + B → AB
split apart
AB → A + B
Single Replacement
Double
Replacement
trade 1 place
AB + C → AC + B
trade 2 places
AB + CD → AC + BD

14. Which type of reaction?
4 P + 5 O2 → P4O10
Synthesis

15. Which type of reaction?
Cl2 + 2NaBr → 2NaCl + O2
Single Replacement

16. Double Replacement Which type of reaction?
BaCl2 + Na2SO4→ 2NaCl + BaSO4
Double
Replacement

17. Which type of reaction?
2 HgO + Cl2→ 2HgCl + O2
Single Replacement

18. Which type of reaction?
2 Al2O3 → 4 Al + 3 O2
Decomposition

19. Which type of reaction?
CuCl2 + H2S → CuS + 2HCl
Double
Replacement

20. Which type of reaction?
3 H2 + N2 → 2 NH3
Synthesis

21. Which type of reaction?
2 HgO → 2Hg + O2
Decomposition