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
The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction
2H2O2 → 2 H2O + O2
CaCO3 → CaO + CO2
H2CO3 → H2O + CO2
Another example is the decomposition of potassium chloride into potassium and chlorine gas.
2KCl(s) → 2 K(s) + Cl2(g
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