Butyric Acid Is Responsible for the Odor in Rancid Butter

question 95

Multiple Choice

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 K_a for the acid?

• A)0.36
• B)2.4 × 10 ⁻²
• C)7.8 × 10 ⁻³
• D)1.5 × 10 ⁻⁵
• E)None of these choices are correct.

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