Redox and Equivalent ConceptHard

Question

In the reaction, MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O, the equivalent weight of HCl is

Options

A.M
B.M/2
C.2M
D.M/4

Solution

The reaction is balanced by the loss and gain of 2 moles of electron per mole of MnO2 and hence,

$E_{HCl} = \frac{4M}{2} = 2M$

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