Step-by-step explanation:
To find the concentration of hydroxide ions ([OH-]), we can use the equation:
pOH = -log[OH-]
Rearranging the equation to solve for [OH-]:
[OH-] = 10^(-pOH)
Substituting the given pOH value:
[OH-] = 10^(-5.51)
Calculating the value:
[OH-] ≈ 3.35 x 10^(-6)
Answer : [OH-] ≈ 3.35 x 10^(-6)