Question

The equivalent weight of $H _{3} PO _{2}$, when it disproportionates into $PH _{3}$ and $H _{3} PO _{3}$ is

• A. 82
• B. 61.5
• C. 41
• D. 20.5

Answer 1

Answer: (B)

61.5

Answer 2

The reaction can be written as Molecular weight of $H_{3} PO _{2}$ $=3+31+48=82$ Equivalent weight $=\frac{82}{4}+\frac{82}{2}=61.5$