Question

Calculate normality and molarity of 25% (w/v) $N{H}_3$ solution:

Answer 1

25% (w/v) of $N{H}_3$ solution $⟹$ 25 g for 100 ml of solution.

$Molarity=\frac{mass}{Molarmass}\times \frac{1000}{V\left(inml\right)}=\frac{25}{17}\times \frac{1000}{100}=\frac{250}{17}=15.2M$

Molarity=Normality of $N{H}_3$