Question

Consider two solutions, solution A and solution B. [H+] in solution A is 500 times greater than that in solution B. what is the difference in the pH values of the two solutions?

Answer 1

Answer: The difference in the pH values of the two solutions is 2.7

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

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

a) For solution A, let $[H^+]$  = $0.0001\times 500M=0.05M$

Putting in the values:

$pH=-\log[0.05]$

$pH=1.3$

b) For solution B, $[H^+]$  =$0.0001M$

Putting in the values:

$pH=-\log[0.0001]$

$pH=4$

Thus the difference in pH will be (4-1.3)= 2.7.