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The purity of H2O2 in a given sample is ...

The purity of `H_2O_2` in a given sample is `85%.` Calculate the weight of impure sample of `H_2O_2` which requires `10mL` of `M//5 KMnO_4` solution in a titration in acidic medium

A

2 g

B

0.2 g

C

0.17 g

D

0.15 g

Text Solution

Verified by Experts

The correct Answer is:
B

`m" Eq of "MnO_(4)^(ɵ)-=m" Eq of "H_(2)O_(2)`
`10xx(M)/(5)xx5-=m" Eq of "H_(2)O_(2)`
`implies10mEq-=m" Eq of "H_(2)O_(2)`
Weight of `H_(2)O_(2)-=10xx10^(-3)xx(34)/(2)=0.17g`
Weiht of impure `H_(2)O_(2)=(100)/(85)xx0.17=0.2g`
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