Question

What will be the equivalent weight of H3PO2 when it disproportionate into PH3 and H3PO4?

Answer 1

Answer:

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Explanation:

So, when H3PO2 changes into PH3, oxidation state of phosphorous changes from +1 to -3 so as n-factor is 4. Also when H3PO2 changes into H3PO4, oxidation state of phosphorous changes from +1 to +5 so as n-factor is again 4. Thus the eq weight=M/(4/3)=3M/4