Question

In order to prepare 1lit normal solution of KMNO4, how many grams of KMNO4 are required if the solution is to be used in acidic medium for oxidation
A) 158
B)79
C)31.6
D)790​

Answer 1

Answer:

C) 31. 6

Explanation:

In order to prepare one liter 1N solution of KMnO4, 31. 6 grams of KMnO4 are required, if the solution to be used in acid medium for oxidation.

Answer 2

Verified answer ✔️

One liter 1N solution of KMnO4 corresponds to 1 g equivalent. In acid medium for oxidation, the equivalent weight of KMnO4 is one fifth of its molecular mass.

It is

$\frac{158}{5} = 31.6$

Hence, 1 g equivalent of KMnO4 corresponds to 31.6 g.

Hence, in order to prepare one liter 1N solution of KMnO4, 31.6 grams of KMnO4 are required, if the solution to be used in acid medium for oxidation.

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