Ch 11 QUIZ - AP Chemistry

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Ch 11 QUIZ - AP Chemistry

Name:_______________________________ Date:_________________ Hr:____AP CHEMISTRYCh 11 – Properties of SolutionsQUIZ_____ 3. Consider the distillation of a mixture of benzene (C 6 H 6 ), phenol (C 6 H 5 OH), andtoluene (C 6 H 5 CH 3 ). Which of the following statements would best explain the results?(A) Benzene was the first distillate collected because it has the strongest intermolecularattractions.(B) Phenol was the first distillate collected because its hydrogen-bonding is strongerthan the London dispersion forces of benzene and toluene.(C) Toluene was the first distillate collected because it has stronger intermolecularattractions than benzene due to its larger size and more polarizable electron cloud.(D) The intermolecular attractions of benzene are weaker than those of toluene and theintermolecular attractions of toluene are weaker than those of phenol._____ 4. Which of the following particulate level diagrams represents a process associatedwith the formation of a solution that is always an exothermic process?KEY: solvent(A)solute(B)(C)(D)2013Page 2 of 4


Name:_______________________________ Date:_________________ Hr:____AP CHEMISTRYCh 11 – Properties of SolutionsQUIZ_____ 5. Which of the following reactions is not a redox reaction? (Note: Four balancedchemical equations will be necessary to assist you in justifying your answer)(A) A piece of phosphorus is burned in air to form tetraphosphorus decoxide.(B) Solutions of potassium chromate and silver nitrate are mixed to form silverchromate precipitate in potassium nitrate solution.(C) Sulfate ions and chromium(III) ions are produced when a solution of dichromate ionsis mixed with an excess of an acidified solution of sulfite ions.(D) Upon heating, potassium chlorate decomposes into potassium chloride and oxygen._____ 6. Alcohol dissolves in water to give a solution that boils at a lower temperature thanpure water. Salt dissolves in water to give a solution that boils at a higher temperaturethan pure water. Which of the following statements concerning vapor pressure is thebest to use in order to explain these observations?(A) Alcohol has a higher vapor pressure than water.(B) Salt is a non-volatile solute and solute-solvent interactions decrease the vaporpressure of the solution.(C) As vapor pressure decreases, the boiling point of a solution decreases.(D) Compared to pure water, an alcohol-water solution has a lower vapor pressure._____ 7. A mixture of 1.00 mol of molecules of NH 3 (g) and 3.01 x 10 23 molecules of H 2 O(g) hasa total pressure of 6.00 atm. What is the partial pressure of NH 3 (g)?(A) 1.00 atm(B) 2.00 atm(C) 3.00 atm(D) 4.00 atm_____ 8. I couldn’t think of another question, so just pick 48.9 L and explain why you lovestudying chemistry for full credit.(A) 48.9 L(B) 9.84 mL(C) 8.94 L(D) 98.4 L2013Page 3 of 4

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