MCAT General Chemistry Question 188: Answer and Explanation

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Question: 188

8. In the reaction A + 2 B → C, the rate law is experimentally determined to be rate = k[B]². What happens to the initial rate of reaction when the concentration of A is doubled?

A. Cl^-
B. Ar
C. K⁺
D. Ca²⁺

Correct Answer: D

Explanation:

D All four answer choices have the same number of electrons and the same electron configuration. Ca²⁺ has the most protons pulling on these electrons, so it will be the smallest.

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