Question

How much water is to be added to dilute 50 mL of 5 N HCl to make it seminormal?

Answer 1

use the formula to calculate normality of mixture

Answer 2

Molarity= (number of moles of that substance) / (Volume of solution in litres)

5= (number of moles of HCl) / 0.05

Thus,

Number of moles of HCl = 5 x 0.05 = 0.25

The number of moles of HCl will remain unchanged.

Now, for new solution,

0.25= 0.25 / (New volume of solution in litres)

Thus,

New volume = 1 litre

Thus, amount of water added = 1- 0.05 litre = 0.95 litre = 950 ml