1.

The purity of H_(2)O_(2) in a given sample is 85%. The weight of impure sample of H_(2)O_(2) which required 10 ml of M//5 KMnO_(4) solution in a titration in acidic medium is 0.1 x.Find x?

Answer»


Solution :M EQ `MnO_(4)^(Theta)` = m eq of `H_(2)O_(2)`
`10xx(1)/(5)xx5` = m eq of `H_(2)O_(2)`
m. eq `H_(2)O_(2)` = 100 MEQ
WEIGHT of `H_(2)O_(2)=10xx10^(-3)xx(34)/(2)=0.17gm`
wt of imure `H_(2)O_(2)=(100)/(85)xx0.17=0.2gm`


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