Redox and Equivalent ConceptHard

Question

In the following unbalanced redox reaction, Cu3P + Cr2O72− → Cu2+ + H3PO4 + Cr3+, the equivalent weight of H3PO4 is

Options

A.M/3
B.M/6
C.M/7
D.M/8

Solution

$Cu_{2}P^{- 3} \rightarrow H_{3}{\overset{+ 5}{PO}}_{4}$

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