Under standard conditions, how can the pH of a solution be calculated given the [OH⁻] in the solution?

• A. Determine the pOH of the solution by using the formula pOH = −log[OH⁻]. Under standard conditions, pH + pOH = 14. To calculate pH, rearrange the formula to pH = 14 − pOH.
• B. Substitute [OH⁻] to pH = −log[OH⁻].
• C. Determine the pOH of the solution by using the formula pOH = −log[OH⁻]. Under normal conditions, pH = pOH.
• D. Determine the [H₃O⁺] in the solution by using the formula [H₃O⁺] = 14/[OH⁻]. Then, substitute the obtained value to pH = 14 − log[H₃O⁺].

Answer: (A)