Question

Molarity of a given orthophosphoric acid solution is $3M$. It's normality is

• A. 9 N
• B. 0.3 N
• C. 3 N
• D. 1 N

Answer 1

Answer: (A)

Orthophosphoric acid $\left(H_{3}P{O}_4\right)$ is a tribasic acid.
$\therefore$ Normality $=$ molarity $\times$ basicity
$\therefore$ Normality $=3M\times 3=9N$