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Balanced Chemical Equation

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Question

When potassium chlorate $(K C l O_{3})$ 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.

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Solution

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

The balanced chemical equation is

$2 K C l O_{3} Δ \to 2 K C l + 3 O_{2}$

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Q. Potassium chlorate decomposes, on heating, to form potassium chloride and oxygen. When 24.5 g of potassium chlorate is decomposed completely, then 14.9 g of potassium chloride is formed. Calculate the mass of oxygen formed. Which law of chemical combination have you used in solving this problem?

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Q. Potassium chlorate on heating decomposes as under:

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[K = 39; O = 16; C l = 35.5]

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