The pH of a solution is measured to be 5.4. Calculate the following:

Question

The pH of a solution is measured to be 5.4. Calculate the following:

[H₃O⁺]

pOH

[OH^-]

Answer 1

Solution

Given data

PH = 5.4

[H₃O⁺] = [H⁺] = 10^-PH

[H⁺] = 10^-5.4 = 3.98 x 10^-6 M

POH = 14 - PH = 14 - 5.4 = 8.6

[OH^-] = 10^-POH = 10^-8.6 = 2.51 x 10^-9 M

PH = -log [H⁺]

POH = -log [OH^-]

PH + POH = 14