Calculate the hydroxide ion concentration in an aqueous solution that contains 3.50 × 10-3 M in hydronium ion.Group of answer choices2.86 × 10-11 M2.86 × 10-12 M3.50 × 10-12 M2.86 × 10-4 M
Question
Calculate the hydroxide ion concentration in an aqueous solution that contains 3.50 × 10-3 M in hydronium ion.Group of answer choices2.86 × 10-11 M2.86 × 10-12 M3.50 × 10-12 M2.86 × 10-4 M
Solution
To calculate the hydroxide ion concentration, we need to use the ion product of water (Kw), which is 1.0 x 10^-14 at 25 degrees Celsius. The equation is:
Kw = [H3O+][OH-]
We know the concentration of hydronium ions [H3O+] is 3.50 x 10^-3 M. We can rearrange the equation to solve for [OH-]:
[OH-] = Kw / [H3O+]
Substituting the known values:
[OH-] = (1.0 x 10^-14) / (3.50 x 10^-3 M)
[OH-] = 2.86 x 10^-12 M
So, the hydroxide ion concentration in the solution is 2.86 x 10^-12 M.
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