Final answer:
To determine the pOH of a 5.60 x 10^-8 M NaOH solution, we calculate pOH = -log[OH-] and find that the pOH is approximately 7.25.
Step-by-step explanation:
To determine the pOH of a 5.60 x 10-8 M NaOH solution, we first recognize that NaOH is a strong base, which dissociates completely in aqueous solution.
Therefore the concentration of hydroxide ions [OH-] is equal to the concentration of NaOH, which is 5.60 x 10-8 M.
The pOH is then calculated using the formula pOH = -log[OH-].
Calculating the pOH:
pOH = -log(5.60 x 10-8)
pOH ≈ 7.25
Note that the pH can also be determined using the relationship pH + pOH = 14.00 at 25°C, however, this is not required by the question.