To determine the pH of a solution given its pOH, we use the relationship between pH and pOH, which is expressed by the equation:
[tex]\[ \text{pH} + \text{pOH} = 14 \][/tex]
Given that the pOH of the solution is 4.91, we need to find the pH. We can rearrange the equation to solve for pH:
[tex]\[ \text{pH} = 14 - \text{pOH} \][/tex]
Substituting the given pOH value into the equation:
[tex]\[ \text{pH} = 14 - 4.91 \][/tex]
Now, performing the subtraction:
[tex]\[ \text{pH} = 9.09 \][/tex]
Therefore, the pH of the solution is 9.09.
