The pH value indicates the concentration of H+ ions in the solution. We are given the value of the concentrations of the OH- ions, so we can find the pOH using the following equation:
[tex]pOH=-log\lbrack OH^-\rbrack[/tex]The sum of pH and pOH will always be equal to 14, so we find the pH by clearing it from the following relationship:
[tex]pH+pOH=14[/tex]So, pOH value will be:
[tex]pOH=-log\lbrack5.6\times10^{-4}\rbrack=3.3[/tex]The pH will be:
[tex]\begin{gathered} pH=14-pOH \\ pH=14-3.3=10.7 \end{gathered}[/tex]The pH of the solution will be 10.7
