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April 19, 2014

Homework Help: Chemistry

Posted by Saira on Sunday, October 12, 2008 at 12:22am.

A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic solution? Assume the density of the aqueous solution of H2O2 ( aq) is 1.00 g/ mL.


H2O2(aq) + H + I^-(aq) ---> H20(l)+I2 (not balanced)

S203^2- + I2 ----> S406 ^2- (aq) + I^- (aq) (not balanced)

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