What is the concentration of hydrogen ions [h+] in a solution of ph = 4.0?
1 × 104m
4 × 10–4m
2 × 10–2m
1 × 10–4m

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 and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

Given: pH= 4.0

Putting in the values in the given equation:

Thus concentration of hydrogen ions [H+] in a solution of pH = 4.0 is

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