Question

When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is ________.

Options

• \[\ce{K2SO4}\]

• \[\ce{K2MnO3}\]

• \[\ce{K2MnO4}\]

• \[\ce{KMnO4}\]

Answer 1

When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is \[\underline{\ce{K2MnO4}}\].

Explanation:

When a mixture of manganese dioxide, potassium hydroxide, and potassium chlorate is combined, the potassium chlorate decomposes first, yielding potassium chloride and oxygen gas. K₂MnO₄ is created when the generated O₂ gas combines with MnO₂ and KOH. The following are the equations for the above reaction:

\[\ce{2KCIO3(s) ->[\Delta][MnO2] 2KCI(s) + 3O2(g)}\]

\[\ce{2MnO2 + 4KOH + O2 -> 2K2MnO4 + 2H2O}\]