The pK_a of formic acid is 3.75. What is the K_a of formic acid? A) 1.8 × 10⁻¹⁸ B) 5.6 × 10⁻¹¹ C) 1.8 × 10⁻⁴ D) 5.6 × 10³

Name: The pK a of formic acid is 3.75. What is the K a of formic acid? A) 1.8 × 10 −18 B) 5.6 × 10 −11 C) 1.8 × 10 −4 D) 5.6 × 10 3
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Quizplus · Accepted Answer

pK_a = 3.75 = -log(K_a) So, K_a = 10^(-pK_a) = 10^(-3.75) = 1.78 × 10^(-4) Option C is the only one that matches this value.

The PKa of Formic Acid Is 3

The PK_a of Formic Acid Is 3