Determine the pH of a KOH solution made by mixing 0.251 g KOH with enough water to make 1.00 * 10² mL of solution. A)1.35 B)2.35 C)7.00 D)11.65 E)12.65

Question

Quizplus · Accepted Answer

KOH is a strong base and dissociates completely in water. First, calculate the molarity of the KOH solution: Molar mass of KOH = 56.11 g/mol. Moles of KOH = 0.251 g / 56.11 g/mol = 0.00447 mol. Molarity = 0.00447 mol / 0.1 L = 0.0447 M. Since KOH is a strong base, [OH⁻] = 0.0447 M. pOH = -log(0.0447) = 1.35. pH = 14 - pOH = 12.65.

Determine the PH of a KOH Solution Made by Mixing