Understanding KOH
* KOH is a strong base, meaning it completely dissociates in water. This means that a 1.0 x 10⁻⁴ M solution of KOH will produce 1.0 x 10⁻⁴ M of hydroxide ions (OH⁻).
Using the pOH Scale
* The pOH scale is related to the concentration of hydroxide ions (OH⁻). The formula is:
pOH = -log[OH⁻]
* In our case:
pOH = -log(1.0 x 10⁻⁴) = 4
Relating pOH to pH
* The pH and pOH scales are related by the following equation:
pH + pOH = 14
* Therefore:
pH = 14 - pOH = 14 - 4 = 10
Answer: The pH of a 1.0 x 10⁻⁴ M solution of KOH is 10.
