Final answer:
To calculate the pH of a KOH solution, we need to remember that KOH is a strong base that dissociates completely in water. The concentration of hydroxide ions ([OH-]) in the solution will be equal to the concentration of KOH. In this case, the concentration of KOH is 6.50 × 10⁻³ mol/L.
Step-by-step explanation:
To calculate the pH of a KOH solution, we need to remember that KOH is a strong base that dissociates completely in water. The concentration of hydroxide ions ([OH-]) in the solution will be equal to the concentration of KOH. In this case, the concentration of KOH is 6.50 × 10⁻³ mol/L.
We can use the following equation to calculate the pOH of the solution: pOH = -log[OH-]. Plugging in the value, we get pOH = -log(6.50 × 10⁻³) = 2.19.
The pH can be calculated using the equation: pH = 14 - pOH. Substituting the value of pOH, we get pH = 14 - 2.19 = 11.81.