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In order to prepare one litre normal sol...

In order to prepare one litre normal solution of `KMnO_(4)`, how many grams of `KMnO_(4)` are required if the solution is used in acidic medium for oxidation

A

158 g

B

31.60g

C

62.0g

D

790g

Text Solution

Verified by Experts

The correct Answer is:
B
In acidic medium 2 molecules of `KMnO_(4)` gives 5 atoms of oxygen.
`2KMnO_(4) + 3H_(2)SO_(4) to K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5(O)`
Eq.wt ` = (158)/(5) = 31.6`
So, equivalent wt. of `KMnO_(4)` in acidic medium is = 31.6 g
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