Question

A solution with a pH of 2.0 has a hydronium ion concentration ten times greater than a solution with a pH of

Answer 1

Answer:The correct answer is (3).

Explanation:

The pH of the solution is defined as negative logarithm of $H^+$ or hydronium ions ions in the solution.

$pH=-\log[H^+]$

$2=-\log[H^+]$

$[H^+]=0.01 M$

The pH with 10 times the concentration $H^+$ ions.

$[H^+]=10\times [H^+]'$

$pH=-\log[H^+]'=-\log[\frac{0.01}{10}]=3$

Hence, the correct answer is (3).

Answer 2

The answer is (3) 3.0. The solution with a pH of 2.0 has greater concentration means the other solution has greater pH. pH=-lg[H+]. So we can get the pH of other solution is 3.