Calculate the hydroxide ion concentration in an aqueous solution that contains 3.50 × 10^{- 4} M in hydronium ion. A)2)86 × 10^{- 3} M B)2)86 × 10^{- 10} M C)2)86 × 10^{- 11} M D)3)50 × 10^{- 11} M

Question

Quizplus · Accepted Answer

The Kw constant for water indicates that [H+][OH-] = 1.0 × 10^-14 M^2. Therefore, to find the hydroxide ion concentration, we can rearrange the equation to get:

[OH-] = 1.0 × 10^-14 M^2 / [H+]

Plugging in the given hydronium ion concentration, we get:

[OH-] = 1.0 × 10^-14 M^2 / (3.50 × 10^-4 M)

[OH-] = 2.86 × 10^-11 M

Therefore, the answer is choice C, 2.86 × 10^-11 M.

Calculate the Hydroxide Ion Concentration in an Aqueous Solution That