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Question

For the given redox reaction
K2Cr2O7+14HCl2KCl+2CrCl3+3Cl2+7H2O
What is the equivalent mass of HCl? [Given; MHCl=36.6 g mol1]

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Solution

K2Cr2O7+14HCl2KCl+2CrCl3+3Cl2+7H2On - factor of K2Cr2O7=6
Again the oxidation state of Cl is getting changed from 1 to 0
n - factor of HCl = 614=37EHCl=MHCln-factor of HCl=7M3=7×36.63=85.40

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