Question

Find out the normality of a $2$ M solution of phosphoric acid ( $H_{3}P{O}_4$) for an acid-base titration?

• A. $0.67$
• B. $2$
• C. $3$
• D. $6$

Answer 1

The correct option is D $6$

$H_{3}P{O}_4\to 3H^{+}+P{O}_4^{3-}$
Phosphoric acid is tribasic acid.
Normality $=$ molarity $\times$ valence electron $=2$ M $\times$ $3=6$ N
Hence, $2$ M solution of phosphoric acid ( $H_{3}P{O}_4$) is 6 N for an acid-base titration.