Question

In calculating the equivalent weight of KMnO4 , why the molecular weight was divided by ( 5 ) ?
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Answer 1

Answer:

For Mn+7 going to Mn+2, 5 electrons are gained, so the equivalent weight is the molecular weight divided by 5. Now, equivalent weight = [molar mass][/number of electrons gained/lost] Therefore,The Equivalent Weight = 158/5 = 31.6 grams.

Explanation:

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