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What is the pH of a solution where [OH-] = 5.6 × 10-4 M?

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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:


pOH=-log\lbrack OH^-\rbrack

The sum of pH and pOH will always be equal to 14, so we find the pH by clearing it from the following relationship:


pH+pOH=14

So, pOH value will be:


pOH=-log\lbrack5.6*10^(-4)\rbrack=3.3

The pH will be:


\begin{gathered} pH=14-pOH \\ pH=14-3.3=10.7 \end{gathered}

The pH of the solution will be 10.7

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