What Is the Hydronium Ion Concentration of a 0

question 22

Multiple Choice

What is the hydronium ion concentration of a 0.500 M acetic acid solution with K_a = 1.8 × 10^-5?
The equation for the dissociation of acetic acid is:
CH₃CO₂H(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CH₃CO₂^-(aq)

• A)3.0 × 10^-2 M
• B)4.2 × 10^-2 M
• C)3.0 × 10^-3 M
• D)4.2 × 10^-3 M

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