What is the OH- concentration of a solution that has a pH of 9.66?
To determine the OH- concentration of a solution from the pH value, we can use the equation:
pOH = 14 - pH
The pOH is the negative logarithm (base 10) of the hydroxide ion (OH-) concentration.
First, we need to calculate the pOH value using the given pH of 9.66:
pOH = 14 - 9.66
pOH = 4.34
Now, we need to convert the pOH value back to OH- concentration by taking the antilog of pOH:
OH- concentration = 10^(-pOH)
Calculating the OH- concentration:
OH- concentration = 10^(-4.34)
OH- concentration ≈ 0.00004795 M
Therefore, the OH- concentration of the solution with a pH of 9.66 is approximately 0.00004795 M.
pH + pOH = pKw = 14
Solve for pOH. Then
pOH = -log(OH^-)
Solve for OH^-