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A beaker contains a dilute sodium chloride solution at 1 atmosphere. What happens to the number of s

January 2019 NY Regents Chemistry Exam


15 A beaker contains a dilute sodium chloride solution at 1 atmosphere. What happens to the number of solute particles in the solution and the boiling point of the solution, as more sodium chloride is dissolved?

(1) The number of solute particles increases, and the boiling point increases.

(2) The number of solute particles increases, and the boiling point decreases.

(3) The number of solute particles decreases, and the boiling point increases.

(4) The number of solute particles decreases, and the boiling point decreases.


Solution: When more solute is dissolved in pure solvent, like sodium chloride in water, it causes the boiling point to increase and the freezing point to decrease.

Answer: 1


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