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The equivalent mass of potassium permang...

The equivalent mass of potassium permanganate in alkaline medium is

A

molar mass / 5

B

molar mass / 3

C

molar mass / 2

D

molar mass itself

Text Solution

Verified by Experts

The correct Answer is:
b
In the akaline medium conversing of `MnO_(4)^(-)` to
`MnO_(4)^(-)+2H+(2)O+3e^(-)rarrMnP_(2)+4OH^(-)MnO_(2)` is `3e^(-)` change and hence
Eq wt of `KMnO_(4)` = Molar mass / 3
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