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

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Presentation transcript:

Decomposition Reactions

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

Decomposition Reaction

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

mercury(II) oxide 

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

lead(II) oxide 

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

lead(II) carbonate →

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

potassium chlorate →

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

potassium hydroxide →

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

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

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