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A 20 ml solution containing 0.2 g impure...

A 20 ml solution containing 0.2 g impure `H_(2)O_(2)` reacts completely with 0.316 g of `KMnO_(4)` in acidic medium. What would be volume strength of `H_(2)O_(2)` solution? [Given: Molar mass of `H_(2)O_(2)=34` & `KMnO_(4)= 158` g/mol]

Text Solution

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The correct Answer is:
`2.80`
Meq of `H_(2)O_(2)=` Meq of `KMnO_(4)`
`(w xx1000)/(17)=(0.316)/(158//5)xx1000`
`W_(H_(2)O_(2))=0.18 gm`.
Normality of `H_(2)O_(2)=(w)/(E )xx(1000)/("Volume (in ml)")=(0.17)/(17)xx(1000)/(20)=0.5`
Volume strength `= N xx5.6=0.5xx5.6=2.8`
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