A 2.350×10−2 M solution of NaCl in water is at 10.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 989.3 mL . The density of water at 21.0∘C is 0.9992 g/mL. a) Calculate the molality of the salt solution. Express your answer to four significant figures and include the appropriate units. b) Calculate the mole fraction of salt in this solution. Express the mole fraction to four significant figures. c) Calculate the concentration of the salt solution in percent by mass. Express your answer to four significant figures and include the appropriate units. d) Calculate the concentration of the salt solution in parts per million. Express your answer as an integer to four significant figures and include the appropriate units.
A 2.350×10−2 M solution of NaCl in water is at 10.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 989.3 mL . The density of water at 21.0∘C is 0.9992 g/mL. a) Calculate the molality of the salt solution. Express your answer to four significant figures and include the appropriate units. b) Calculate the mole fraction of salt in this solution. Express the mole fraction to four significant figures. c) Calculate the concentration of the salt solution in percent by mass. Express your answer to four significant figures and include the appropriate units. d) Calculate the concentration of the salt solution in parts per million. Express your answer as an integer to four significant figures and include the appropriate units.
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter13: Solutions And Their Behavior
Section: Chapter Questions
Problem 104SCQ: Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride...
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A 2.350×10−2 M solution of NaCl in water is at 10.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 989.3 mL . The density of water at 21.0∘C is 0.9992 g/mL.
a) Calculate the molality of the salt solution.
Express your answer to four significant figures and include the appropriate units.
b) Calculate the mole fraction of salt in this solution.
Express the mole fraction to four significant figures.
c) Calculate the concentration of the salt solution in percent by mass.
Express your answer to four significant figures and include the appropriate units.
d) Calculate the concentration of the salt solution in parts per million.
Express your answer as an integer to four significant figures and include the appropriate units.
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