1. Decomposition Reactions

2. Decomposition One reactant decomposes into two or more products. AX  A + X

3. Decomposition Reaction

4. Decomposition is usually caused by heating or an electric current. water 

5. mercury(II) oxide 

6. 1. Some metallic oxides, when heated, decompose into the component elements. Metallic oxide  metal + oxygen MO  M + O 2

7. lead(II) oxide 

8. 2. Some metallic carbonates, when heated, decompose into metallic oxides and carbon dioxide. metallic carbonate  metallic oxide + carbon dioxide MCO 3  MO + CO 2

9. lead(II) carbonate →

10. 3. Some metallic chlorates, when heated, decompose into metallic chlorides and oxygen. metallic chlorate  metallic chloride + oxygen MClO 3  MCl + O 2

11. potassium chlorate →

12. 4. Metallic hydroxides, when heated, decompose to form metallic oxides and water. metallic hydroxide  metallic oxide + water MOH  MO + H 2 O

13. potassium hydroxide →

14. 5. Some compounds can be decomposed by the application of an electric current 2NaCl(s) 2Na(s) + Cl 2 (g)

15. 6. Some oxyacids, when heated, decompose to form water and a nonmetallic oxide carbonic acid  water + carbon dioxide

16. Chemical Reactions Double Replacement Precipitation Reactions Acid - Base Reactions Oxidation - Reduction Synthesis Reactions Decomposition Reactions Single Replacement Reactions Combustion Reactions