0.5 g mixture of and was treated with excess of KI in acidic medium

CHEMISTRY · Subjective · CBSE · Chemistry · Redox Reactions · Redox Reactions

Problem

0.5 g mixture of K2Cr2O7\text{K}_2\text{Cr}_2\text{O}_7 and KMnO4\text{KMnO}_4 was treated with excess of KI in acidic medium. Iodine liberated required 100 cm3 of 0.15N sodium thiosulphate solution for titration. Find the mass per cent of each in the mixture.

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