Understanding the Relationship
* pH and pOH: pH and pOH are measures of acidity and alkalinity, respectively. They are related by the following equation:
pH + pOH = 14
* Hydroxide Ions (OH-) and pOH: pOH is calculated using the hydroxide ion concentration ([OH-]) as follows:
pOH = -log[OH-]
Calculation
1. Find the pOH:
pOH = -log(1 x 10⁻⁵ M) = 5
2. Calculate the pH:
pH + 5 = 14
pH = 14 - 5 = 9
Therefore, the pH of a solution with a hydroxide ion concentration of 1 x 10⁻⁵ M is 9.
