Question

As the pH of a solution is changed from 3 to 6, the concentration of hydronium ions

(1) increases by a factor of 3
(2) increases by a factor of 1000
(3) decreases by a factor of 3
(4) decreases by a factor of 1000

Answer 1

The answer is (4) decrease by a factor of 1000. The higher the pH, the lower the concentration of hydronium ion. And the relationship between the pH and concentration of H3O+ is pH = -lg[H3O+].

Answer 2

Answer : Option D) Decreases by a factor of 1000.

Explanation : When the pH of lower concentration of hydronium ion
`H^(+)` is increased the pH values decreases by the factor of 1000.

From, the relation of pH and the concentration of hydronium ion we can relate it easily;

pH = - log [
`H^(+)` ]

So, when the pH is lower the concentration of hydronium ion will increase in the solution and vice-versa.