Equivalent weight of `H_(3)PO_(2)` when it disproportionates into `PH_(3)` and `H_(3)PO_(3)` is (mol.wt. of `H_(3)PO_(2)=M`)

Equivalent weight of H_3PO_2 when it disproportionate into PH_3 and H_3PO_3 is :

Equivalent mass of H_3PO_2 when it disproportionate into PH_3 and H_3PO_3 is (mol. wt. of H_3PO_2 = M ) :

(a). What is the equivalent weight of H_3PO_2 when it disproportionates into PH_3 and H_2PO_3 ? (b). What ist he equivalent weight of H_3PO_2 when it acts as an acid?