Final answer:
Substituting the pOH value of 2.28 into the formula, we get [OH-] = 10^-2.28 = 0.00501 M. The [OH-] in a solution with a pOH of 2.28 is 0.00501 M.
Step-by-step explanation:
The pOH of a solution can be calculated by subtracting the given pOH value from 14.
In this case, the given pOH is 2.28, so the pH can be calculated as 14 - 2.28 = 11.72.
Since pOH is the negative logarithm of the hydroxide ion concentration, we can calculate the hydroxide ion concentration by using the formula [OH-] = 10^-pOH.
Substituting the pOH value of 2.28 into the formula, we get [OH-] = 10^-2.28 = 0.00501 M.