AP Chemistrymediummcq1 pt
What is the percent ionization of 0.10 M acetic acid? (Ka = 1.8 × 10⁻⁵)
A.1.3%
B.13%
C.0.13%
D.100%
Explanation
Core Concept
[H⁺] = √(1.8 × 10⁻⁵ × 0.10) = 1.34 × 10⁻³ M. Percent = (1.34 × 10⁻³ / 0.10) × 100% = 1.3%. Weak acids ionize only slightly.
Correct Answer
A1.3%
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