Procedure :
Take 20 ml of 0.1 M solution and add distilled water until reaches 100 ml
Further explanation
Given
0.1 M and 0.02 M solution
100 ml volumetric flask
Required
Diluting procedure
Solution
To find the initial volume that needs to be taken from the 0.1 M solution to be diluted, we can use the dilution formula
M₁V₁ = M₂V₂
0.1 M . V₁ = 0.02 M x 100 ml
V₁ = 20 ml
So we take 20 ml of 0.1 M solution with a pipette, put it into a volumetric flask and add distilled water until the volume reaches 100 ml