\( 20 \mathrm{~mL} \) of a solution containing \( 0.20 \mathrm{~g} \) of impure sample of \( \ma... VIDEO
\( 20 \mathrm{~mL} \) of a solution containing \( 0.20 \mathrm{~g} \) of impure sample of \( \mathrm{H}_{2} \mathrm{O}_{2} \) reacts with \( 0.316 \mathrm{~g} \) of \( \mathrm{KMnO}_{4} \) in presence of \( \mathrm{H}_{2} \mathrm{SO}_{4} \). Find the purity of \( \mathrm{H}_{2} \mathrm{O}_{2} \)
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