Answer:
The pH is 6.1.
Explanation:
1st) With the concentration of OH-, we have to calculate the pOH:
[tex]\begin{gathered} pOH=-log\lbrack OH^-\rbrack \\ pOH=-log(1.25*10^{-8}) \\ pOH=7.9 \end{gathered}[/tex]2nd) Using the relation between pH and pOH, we can calculate the pH:
[tex]\begin{gathered} pH+pOH=14 \\ pH+7.9=14 \\ pH=14-7.9 \\ pH=6.1 \end{gathered}[/tex]So, the pH is 6.1.
