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Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Kₐ for the acid?
- 7.8 times 10⁻³
- 1.5 times 10⁻⁵
- 2.4 times 10⁻²
- 0.36