Question

In the given neutralization reaction the equivalent
weight of base are respectively :-
H2PO4 + 2NaOH → Na2HPO4 + 2H2O
(1) 98, 40
(2) 98, 20
(3) 49, 20
(4) 49, 40​

Answer 1

Answer:

In the Given Reaction,

NaOH + H₃PO₄ ----------→ NaH₂PO₄ + H₂O

We know that for the Acids, the equivalent weight is equal to the ratio of the molar mass and number of the hydrogen ions of the acid accepted by the base.

∴ In the given reaction,

No. of hydrogen ions replaced by the Base of the Acid = 2

Molar mass of the Acid = 98 g/mole.

∴ Equivalent Weight = 98/2

= 49

Hence, the equivalent weight of the Acid is 49.

Explanation: