The pH of a solution of 0.0100 mol dm3 hydrochloric acid is 2. A 10 cm³ sample of the acid is measured out and
distilled water added to dilute it to a total volume of 100 cm³. How do the hydrogen ion concentration and the pH
change as this solution is diluted?
hydrogen ion concentration
decreases by a factor of 10
A
B
decreases by a factor of 100
C
increases by a factor of 10
D decreases by a factor of 10
PH
increases by 1.
decreases by 2
increases by 1
decreases by 1