Question

What is the normality of $0.2M{H}_{3}P{O}_3$ solution?

• A. $0.2N$
• B. $0.1N$
• C. $0.4N$
• D. $0.6N$

Answer 1

Answer: (C)

$0.4N$

$H_{3}P{O}_3$ is a dibasic acid as it contains two $-OH$ ions.

Thus, basicity of $H_{3}P{O}_3$ is 2.

Normality $=$ basicity $\times$ molarity

$=2\times 0.2$

$=0.4$ N.

Therefore, option C is correct.