Question

20ml of a solution of NaOH is found to be completely neutralised by 16ml of a given solution of HCl. If we take 10ml of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be

Answer 1

The mole ratio for this reaction is :

1 : 1

The volume ratio will be :

20 : 16 = 5 : 4

The new volume of sodium hydroxide is 10ml

The volume of the HCl required is thus :

5/4 = 10/x

5x = 40

X = 8ml