Multiple-Choice and Bimodal Essays - Solutions, Physical Chemistry

Multiple-Choice and Bimodal 1) The process of solute particles being surrounded by solvent particles is known as __________. A) salutation B) agglomeration C) solvation D) agglutination E) dehydration Answer: C 2) Pairs of liquids that will mix in all proportions are called __________ liquids. A) miscible B) unsaturated C) polar liquids D) saturated E) supersaturated Answer: A 3) The solubility of oxygen gas in water at 25 C and 1.0 atm pressure of oxygen is 0.041 g/L The solubility of oxygen in water at 3.0 atm and 25 C is __________ g/L. A) 0.041 B) 0.014 C) 0.31 D) 0.12 E) 3.0 Answer: D 4) The solubility of nitrogen gas in water at 25 C and a nitrogen pressure of 1.0 atm is 6.9 The solubility of nitrogen in water at a nitrogen pressure of 0.80 atm is __________ M. A) 5.5 B) 8.6 C) 1.2 D) 3.7 E) 0.80 Answer: A 5) The solubility of Ar in water at 25 C is 1.6 M when the pressure of the Ar above the solution is 1.0 atm. The solubility of Ar at a pressure of 2.5 atm is __________ M. A) 1.6 B) 6.4 C) 4.0 D) 7.5 E) 1.6 Answer: C 6) On a clear day at sea level, with a temperature of 25 C, the partial pressure of in air is 0.78 atm and the concentration of nitrogen in water is 5.3 . When the partial pressure of is __________ atm, the concentration in water is 1.1 . A) 0.63 atm B) 0.78 atm C) 1.0 atm D) 2.1 atm E) 1.6 atm Answer: E 8) A sample of potassium nitrate (49.0 g) is dissolved in 101 g of water at 100 C, with precautions taken to avoid evaporation of any water. The solution is cooled to 30.0 C and no precipitate is observed. This solution is __________. A) hydrated B) placated C) saturated D) unsaturated E) supersaturated Answer: E Diff: 2 Page Ref: Sec. 13.3 9) A sample of potassium chlorate (15.0 g) is dissolved in 201 g of water at 70 C with precautions taken to avoid evaporation of any water. The solution is cooled to 30.0 C and no precipitate is observed. This solution is __________. A) hydrated B) miscible C) saturated D) unsaturated E) supersaturated Answer: D 10) A sample of potassium nitrate (49.0 g) is dissolved in 101 g of water at 100 C with precautions taken to avoid evaporation of any water. The solution is cooled to 30.0 C and a small amount of precipitate is observed. This solution is __________. A) hydrated B) placated C) saturated D) unsaturated E) supersaturated Answer: C 11) The solubility of MnSO4 monohydrate in water at 20 C is 70.0 g per 100.0 mL of water. A solution at 20 C that is 4.22 M in MnSO4 monohydrate is best described as a(n) __________ solution. The formula weight of MnSO4 monohydrate is 168.97 g/mol. A) hydrated B) solvated C) saturated D) unsaturated E) supersaturated Answer: E 12) A solution is prepared by dissolving 23.7 g of in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of is __________% by mass. A) 5.94 B) 6.32 C) 0.0632 D) 0.0594 E) 6.24 Answer: A 13) The concentration of urea in a solution prepared by dissolving 16 g of urea in 39 g of is __________% by mass. The molar mass of urea is 60.0 g/mol. A) 29 B) 41 C) 0.29 D) 0.41 E) 0.48 Answer: A 14) The concentration of nitrate ion in a solution that contains 0.900 M aluminum nitrate is __________ M. A) 0.900 B) 0.450 C) 0.300 D) 2.70 E) 1.80 Answer: D 15) The concentration of KBr in a solution prepared by dissolving 2.21 g of KBr in 897 g of water is __________ molal. A) 2.46 B) 0.0167 C) 0.0207 D) 2.07 E) 0.0186 Answer: C 16) The concentration of lead nitrate in a 0.726 M solution is __________ molal. The density of the solution is 1.202 g/mL. A) 0.476 B) 1.928 C) 0.755 D) 0.819 E) 0.650 Answer: C 17) The concentration of a benzene solution prepared by mixing 12.0 g with 38.0 g is __________ molal.