Q. The percentage of $P_{2}O_{5}$ in diammonium hydrogen phosphate, $\left( NH_{4} \right)_{2}HPO_{4}$ is
A) 23.48
B) 46.96
C) 53.78
D) 71.00
Explanation
(c)
$2\left( NH_{4} \right)_{2}HPO_{4} \equiv P_{2}O_{5}$
264g 142g
% of $P_{2}O_{2} = \frac{wt.of\ P_{2}O_{5}}{wt.of\ salt}\mathbf{\times}100$
$= \frac{142}{264} \times 100$
$= 53.78\%$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.