Question

Equivalent mass of H3PO4 (Molar mass = M) in the following reaction is 2NaOH + H₂PO₂---> Na₂HPO + 2H₂O
A) m/2
B) m
C) m/3
D) m/4​

Answer 1

Answer:

Hence equivalent weight of H3PO4 = Molar mass of H3PO4/ n factor =982=49 gram per equivalent. Molar mass of Na2HPO4 = 2×atomic mass of sodium + atomic mass of hydrogen + atomic mass of phosphorus +4× atomic mass of oxygen =2×23+1+31+4×16=142 gram per mole.