The purity of H2O2 in a given sample is 85%. Calculate the weight of impure sample of H2O2 which requires 10 mL of M5KMnO4 solution in a titration in acidic medium.
A
2 g
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B
0.2 g
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C
0.17 g
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D
0.15 g
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Solution
The correct option is B0.2 g Milliequivalents of MnO⊝4≡Milliequivalents of H2O2 10×M5×5≡Milliequivalents of H2O2 ⇒10Milliequivalents≡Milliequivalents of H2O2 Weight of H2O2=10×10−3×342=0.17 g Weight of impure H2O2=10085×0.17=0.2 g