Question

When potassium chlorate (KClO3) is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen gas. Represent this in the form of a balanced chemical equation.

Answer 1

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Answer 2

The balanced chemical equation for the heating of potassium chlorate (KClO3) in the presence of manganese dioxide catalyst is:

2 KClO3 (s) + Catalyst + Heat → 2 KCl (s) + 3 O2 (g)

- In this decomposition, the thermally stable ionic compound KCl is formed and oxygen gas is evolved.

- Since heat is supplied for the decomposition of KClO3, this reaction is a thermal decomposition reaction.

- MnO2 catalyst helps in the reaction and increases the rate of reaction.