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Chemical Decomposition Reaction

Overview of a Chemical Decomposition or Analysis Reaction

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In a decomposition reactions, compounds are broken into simpler forms.

In a decomposition reactions, compounds are broken into simpler forms.

David Freund, Getty Images
A chemical decomposition reaction or analysis reaction is one of the most common types of chemical reactions. In a decomposition reaction a compound is broken into smaller chemical species.

AB → A + B

The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction:

2 H2O → 2 H2 + O2

Another example is the decomposition of potassium chloride into potassium and chlorine gas.

2 KCl(s) → 2 K(s) + Cl2(g)

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