What Is the Hydronium Ion Concentration of a 0

question 23

Multiple Choice

What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with K_a = 3.5 × 10^-8? The equation for the dissociation of hypochlorous acid is:
HOCl(aq) + H₂O(l) ⇌ H₃O⁺(aq) + OCl^-(aq)

• A) 1.9 × 10^-4 M
• B) 7.2 × 10^-4 M
• C) 2.8 × 10^-5 M
• D) 7.2 × 10^-5 M

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