What is the hydroxide ion concentration in an aqueous solution when the hydronium ion concentration equals 1 × moles per liter?
A)The concentration of hydroxide ions is 1 × moles per liter.
B)The concentration of hydroxide ions is 1 × moles per liter.
C)The concentration of hydroxide ions is 1 × moles per liter.
D)The concentration of hydroxide ions is 1 × moles per liter.

Question

What is the hydroxide ion concentration in an aqueous solution when the hydronium ion concentration equals 1 ×  moles per liter?
A)The concentration of hydroxide ions is 1 × moles per liter. 
B)The concentration of hydroxide ions is 1 × moles per liter. 
C)The concentration of hydroxide ions is 1 × moles per liter. 
D)The concentration of hydroxide ions is 1 × moles per liter.

Quizplus · Accepted Answer

In water, the concentration of hydronium ions multiplied by the concentration of hydroxide ions equals 1.0 × 10^-14. Therefore, if the hydronium ion concentration is 1.0 × 10^-11 M, then the hydroxide ion concentration is (1.0 × 10^-14) / (1.0 × 10^-11) = 1.0 × 10^-3 M, which is equivalent to 1 × 10^-11ea7cc8_da5a_368e_a2ab_7df62a26eba5_TB2711_11 moles per liter. Therefore, the correct answer is B.

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