The hydronium ion concentration for a solution is determined to be
4.5 x 10^-7 M. What is the concentration of the hydroxide ion?
I just wanted to let the people that are being nice enough to help me know that this is for a study guide. It is not a test or quiz. :0) Thanks.
(H^+)(OH^-) = Kw = 1E-14
To determine the concentration of the hydroxide ion (OH-) in a solution, we can use the concept of Kw, the ion product of water. In water, the concentration of hydronium ions (H3O+) multiplied by the concentration of hydroxide ions (OH-) is always equal to Kw.
At room temperature, Kw = 1.0 x 10^-14. We can use this information to find the concentration of OH-.
Given that the hydronium ion concentration is 4.5 x 10^-7 M, we can substitute this value into the equation to find OH- concentration:
Kw = [H3O+][OH-]
1.0 x 10^-14 = (4.5 x 10^-7) [OH-]
To solve for [OH-]:
[OH-] = (1.0 x 10^-14) / (4.5 x 10^-7)
Now, divide the numbers:
[OH-] ≈ 2.22 x 10^-8 M
Therefore, the concentration of the hydroxide ion in the solution is approximately 2.22 x 10^-8 M.