decomposition+reactions

A **decomposition reaction** involves the breakdown of a compound into two or more compounds or elements.

They follow the general format of **A --> B + C**.

Examples:
 * The electrolytic decomposition of water into hydrogen gas and oxygen gas: 2 H 2 O (l) --> 2 H 2 (g) + O 2 (g)
 * The isolation of metallic sodium from molten salt: 2 NaCl (l) --> 2 Na (s) + Cl 2 (g)
 * The breakdown of limestone into calcium oxide: CaCO 3 (s) --> CaO (s) + CO 2 (g)

Watch this video of the decomposition of potassium chlorate.

Here is a worksheet:

Online practice.

Watch the decomposition of potassium chlorate in the presence of sugar.