What is the hydronium-ion concentration of a 0.0017 M Ba(OH)₂ solution? A)3.4 × 10^-3 M B)1.7 × 10^-3 M C)2.9 × 10^-12 M D)5.9 × 10^-12 M E)1.0 × 10^-7 M

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Quizplus · Accepted Answer

Ba(OH)₂ is a strong base that dissociates completely in water to produce 2 OH⁻ ions per formula unit. Therefore, the OH⁻ concentration is 2 × 0.0017 M = 0.0034 M. Using the relation [H₃O⁺][OH⁻] = 1.0 × 10⁻¹⁴, the [H₃O⁺] = 1.0 × 10⁻¹⁴ / 0.0034 M = 2.9 × 10⁻¹² M.

What Is the Hydronium-Ion Concentration of a 0