What Is the Hydronium Ion Concentration of a 0

question 10

Multiple Choice

What is the hydronium ion concentration of a 0.100 M acetic acid solution with a K_a = 1.8 × 10^-5? The equation for the dissociation of acetic acid is: CH₃CO₂H(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CH₃CO₂^-(aq) .

• A)1.3 × 10^-2 M
• B)4.2 × 10^-2 M
• C)1.3 × 10^-3 M
• D)4.2 × 10^-3 M

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