MCAT General Chemistry Question 59: Answer and Explanation

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Question: 59

14. Which of the following would make the strongest electrolytic solution?

  • A. A nonpolar covalent compound with significant solubility.
  • B. A ionic compound composed of one cation with +3 charge and three anions with -1 charge.
  • C. A polar covalent compound with a small dissociation constant.
  • D. An ionic compound composed of two cations with +1 charge and one anion with -2 charge.

Correct Answer: B

Explanation:

The best electrolytes dissociate readily (have a high dissociation constant) and are ionic compounds with large amounts of cations and anions. This rules out choices (A) and (C). Choice (D) has fewer total ions with a smaller total magnitude of charge and therefore is not as strong an electrolyte as choice (B).

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