MCAT General Chemistry Question 89: Answer and Explanation

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Question: 89

14. Consider the following two reactions:

3 A + 2 B ? 3 C + 4 D (Reaction 1)

4 D + 3 C ? 3 A + 2 B (Reaction 2)

If K_eq for reaction 1 is equal to 0.1, what is K_eq for reaction 2?

A. 0.1
B. 1
C. 10
D. 100

Correct Answer: C

Explanation:

Reaction 2 is simply the reverse of reaction 1. This means that K_eq for reaction 2 is the inverse of K_eq of reaction 1, so the answer is (0.1)^-1 = 10.

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