January 2018 NY Regents Chemistry Exam
47 Why is potassium nitrate classified as an electrolyte? (1) It is a molecular compound. (2) It contains a metal. (3) It can conduct electricity as a solid.
(4) It releases ions in an aqueous solution.
Solution: An electrolyte is a substance that can conduct electricity when dissolved in water. An aqueous solution means dissolved in water.
Answer: 4
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