# Exset4 - Nielsen CHM1041 Exercise Set 4 1 Why does fresh...

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Nielsen Bhaskar/PC/1713N/PC/K 3/05 1 CHM1041 Exercise Set # 4 1. Why does fresh water evaporate faster than seawater under the same conditions? 2. The concentrations of two solutions (nonvolatile, nonelectrolytic solutes) are as follows: 262 No. 1, 5.0g of ethylene glycol, C H O , in 100 g of water; 61 26 No. 2, 8.0 g of glucose, C H O , in 100 g of water; Which solution has the higher (a) vapor pressure, (b) boiling point, (c) freezing point? 3. What are the freezing and boiling points of a solution prepared by dissolving 2 10.0 g of glucose, C H O , in 40.0 g H O? 4. The freezing point of an aqueous solution of a nonelectrolyte is What would be the expected normal boiling point of the same solution? -0.160°C. 5. Arrange the following aqueous solutions in the expected order of decreasing freezing points: 4, 2 0.01 m NaC1, 0.02 m MgSO 0.01 m MgC1 , 0.005 m KBr, 25 0.025 m HC1, 0.015 m C H OH 6. Calculate the freezing point of a 24 0.700 m solution of K SO . 7. The percentage ionization of weak acid HX in water is known to be 10.0 percent for a What is the freezing point of the solution? 0.200 m solution.

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## This note was uploaded on 12/12/2011 for the course CHM 2041 taught by Professor Staff during the Fall '09 term at Santa Fe College.

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Exset4 - Nielsen CHM1041 Exercise Set 4 1 Why does fresh...

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