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)

Question

Quizplus · Accepted Answer

The hydronium ion concentration can be calculated using the formula: [H₃O⁺] = √(Kₐ × [CH₃CO₂H]). Substituting the given values: [H₃O⁺] = √(1.8 × 10⁻⁵ × 0.500) = √(9.0 × 10⁻⁶) = 3.0 × 10⁻³ M.

What Is the Hydronium Ion Concentration of a 0