Question

The percentage of P₂O₅ in diammonium phosphate (NH₄)₂HPO₄ is 

(a) 23.48 

(b) 46.96

(c) 53.78

(d) 71.00

Answer 1

Correct option is (c) 53.78

One mole of (NH₄)₂HPO₄ would give mole of P₂O₅.

Hence, 100 g of the salt gives = \(\frac{\frac 12 \times 142 \times 100}{132}\) = 53.78 g