What is the pH of a 0.010 M solution of acetic acid? K_a for acetic acid is 1.8 *10^-⁵.

Name: What is the pH of a 0.010 M solution of acetic acid? K a for acetic acid is 1.8 *10 - 5 .
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Quizplus · Accepted Answer

The pH of a weak acid solution can be calculated using the formula pH = -log[H⁺], where [H⁺] is found using the expression [H⁺] = √(Kₐ × C). For acetic acid, [H⁺] = √(1.8 × 10⁻⁵ × 0.010) = √(1.8 × 10⁻⁷) ≈ 1.34 × 10⁻⁴. Therefore, pH ≈ -log(1.34 × 10⁻⁴) ≈ 3.37.

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