What occurs when NaCl(s) is added to water?(1) The boiling point of the solution increases, and the freezing pointof the solution decreases.(2) The boiling point of the solution increases, and the freezing pointof the solution increases.(3) The boiling point of the solution decreases, and the freezing pointof the solution decreases.(4) The boiling point of the solution decreases, and the freezing pointof the solution increases.

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TillieMase TillieMase

09-06-2015
Chemistry

Answered

What occurs when NaCl(s) is added to water?(1) The boiling point of the solution increases, and the freezing pointof the solution decreases.(2) The boiling point of the solution increases, and the freezing pointof the solution increases.(3) The boiling point of the solution decreases, and the freezing pointof the solution decreases.(4) The boiling point of the solution decreases, and the freezing pointof the solution increases.

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stephenlee0912 stephenlee0912 · Answer 1 · 2015-06-09T03:39:40-04:00

The answer is (1) Boiling point increases and freezing point decreases. This is a colligative property of solutions. When you add a solvent to a solution, the effect is twofold: boiling point elevation and freezing point depression. In effect, you broaden the range of temperatures over which the solution remains liquid. This is why you might see people putting antifreeze in their cars during the summer. While antifreeze does depress the freezing point of the engine oil, it also raises its boiling point, so it doesn't boil as easily during the summer when the engine may become especially hot.