Answer:
To find the pH of a solution with a given hydroxide ion concentration, we can use the following relationship:
pH = 14 - log[OH-]
where [OH-] is the hydroxide ion concentration.
Given [OH-] = 1.51 x 10^-4 M, we can calculate the pH:
pH = 14 - log(1.51 x 10^-4)
To find the logarithm, use a calculator or software:
log(1.51 x 10^-4) ≈ -3.82
Now, plug the value back into the pH equation:
pH ≈ 14 - (-3.82)
pH ≈ 14 + 3.82
pH ≈ 17.82
So, the pH of the solution is approximately 17.82.