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Question

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


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Solution

Chemical equation:

  • A chemical equation is made up of reactants, products, and an arrow indicating the direction of the reaction.
  • A balanced chemical equation is one in which the number of atoms in all molecules is equal on both sides of the equation.

Decomposition reaction:

  • It is described as the chemical reaction in which a chemical substance breaks down when heated, yielding two or more chemical compounds.
  • It is regarded as the inverse of a combination reaction.

Potassium chlorate (KClO3) when heated in the presence of a manganese dioxide catalyst:

  • When heated in the presence of a manganese dioxide catalyst, potassium chlorate ( KClO3 ) decomposes to create potassium chloride and oxygen gas.
  • The chemical equation that is balanced is:
  • 2KClO3(s) MnO2 2KCl(s) +3O2(g)

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