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Question

What is volume strength of H2O2 solution, whose 40 ml requires 20 ml of 0.2 M acidified KMnO4 solution for complete reaction?

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Solution

For complete reaction we have,
gm eq of H2O2 = gm eq of KMnO4
40×M×2=0.2×5×20
M=0.25 M (M is molarity of H2O2 solution)
So, volume strength of H2O2 solution =11.2×0.25=2.8

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