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50 mL of an aqueous solution of H(2)O(2)...

50 mL of an aqueous solution of `H_(2)O_(2)` was treated with an excess of KI solution and dilute `H_(2)SO_(4)`. The liberated iodine required 20 mL 0.1 N `Na_(2)S_(2)O_(3)` solution for complete interaction. Calculate the concentration of `H_(2)O_(2)` in `g//L`.

Text Solution

Verified by Experts

Meq. of `H_(2)O_(2)` in 25 ml = Meq. of `Na_(2)S_(2)O_(3) = 20 xx 0.3 = 6 `
Normality of `H_(2)O_(2) = 6/25`
Volume strength of `H_(2)O_(2) = 5.6 xx N_(H_(2)O_(2)) rArr 5.6 xx 6/25 = 1.344 `V
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When 100 mL of an aqueous of H_(2)O_(2) is titrated with an excess of KI solution in dilute H_(2)O_(2) , the liberated I_(2) required 50 mL of 0.1 M Na_(2) S_(2)O_(3) solution for complete reaction. Calculate the percentage strength and volume strength of H_(2)O_(2) solution.

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