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Example 1:
Calculate the pH of a solution in which the concentration of the hydrogen ions is 1.0×10^{–8} mol litre^{–1}.
Solution:
Here, although the solution is extremely dilute, the concentration given is not of an acid or a base but that of H^+ ions. Hence, the pH can be calculated from the relation:
Given:
[H^+]=1.0×10^{–8} mol litre^{–1}
pH = –log_{10}10^{–8}
= –(–8×log_{10}10)
Example 2:
If the pH of a solution is 4.5, what is its pOH?
Solution: