Question

A solution of 0.2 mol dm−3 HCl has a pH of
0.7. Of this solution, 25.0 cm3 is taken and made
up to a total volume of 250 cm3 with distilled
water in a volumetric  ask to form solution X.
10.0 cm3 of solution X is taken and made up to a
total volume of 1.00 dm3 with distilled water in a
volumetric  ask; this is solution Y. Work out the pH value for each solution.