Exam 12: Physical Properties of Solutions

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The concentration of nitrogen in water at 25 \circ C was determined to be 7.2 * 10-6 M. Calculate the partial pressure of nitrogen at the surface of the water in mmHg. The Henry's law constant for nitrogen gas at 25 \circ C is 6.8 * 10-4 mol/L·atm.

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A solution made of pentane and hexane has a mole fraction, X = 0.250 of pentane. Hexane is the solute.

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An endothermic solution process is described by which of the following

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How many grams of propanol (C3H7OH, 60.10 g/mol) would be needed to make 750 mL of a solution with an osmotic pressure of 25 atm at 25 \circ C (R = 0.0821 L·atm/K·mol)

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To interconvert the concentration units of molarity (M) and mass percent, you must also know the density of the solution.

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Calculate the molality of a solution containing 14.3 g of NaCl in 42.2 g of water.

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Consider a solution made from a nonvolatile solute and a volatile solvent. Which statement is true

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What is the percent CsCl by mass in a 0.711 M CsCl solution that has a density of 1.091 g/mL

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According to Raoult's law, which statement is false

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What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100. g of benzene by 0.47 \circ C Kf of benzene is 5.12 \circ C/m.

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How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in order to prepare a 0.452 m solution

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For water Kf = 1.86 \circ C/m. Therefore, the freezing points of 1.0 M aqueous KCl and C2H5OH (ethanol) solutions are the same.

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Which of the following aqueous solutions has the highest boiling point (assume 100% dissociation for all soluble ionic compounds)

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What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25 \circ C Kb of water is 0.52 \circ C/m. Assume the density of the solution is the same as that of pure water.

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What is the percent by mass of sodium phosphate in a 0.142 M Na3PO4(aq) solution that has a density of 1.015 g/mL

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An aqueous fructose solution having a density of 1.049 g/cm3 is found to have an osmotic pressure of 17.0 atm at 25 \circ C. Find the temperature at which this solution freezes. [Given: for water Kf = 1.86 \circ C/m; molecular mass of fructose = 180.16 g/mol]

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Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O2(g) in water at 25 \circ C if the atmospheric pressure is 741 mmHg The Henry's law constant for oxygen gas at 25 \circ C is 1.3 * 10-3 mol/L·atm.

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What is the freezing point of an aqueous solution of a nonvolatile solute that has a boiling point of 102.5 \circ C For water Kf = 1.86 \circ C/m and Kb = 0.52 \circ C/m.

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Calculate the mole fraction of KI in a solution made by dissolving 3.4 g of KI in 5.8 g of water.

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Assuming 100% dissociation, which of the following compounds is listed correctly with its van't Hoff factor i

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