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Open Book Practice Quiz

Open Book Practice Quiz. Over Chapters 15 and 16 (There are several pages to this PowerPoint). Multiple Choice Identify the choice that best completes the statement or answers the question.

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Open Book Practice Quiz

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  1. Open Book Practice Quiz Over Chapters 15 and 16 (There are several pages to this PowerPoint)

  2. Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. What is the maximum amount of KCl that can dissolve in 200 g of water? (The solubility of KCl is 34 g/100 g H2O at 20 C.) a. 17 g b. 34 g c. 68 g d. 6800 g ____ 2. What is the molarity of a solution that contains 6 moles of solute in 2 liters of solution? a. 6M b. 12M c. 7M d. 3M ____ 3. What does NOT change when a solution is diluted by the addition of solvent? a. volume of solvent c. number of moles of solute b. mass of solvent d. molarity of solution ____ 4. A crystal that absorbs water vapor from the air is ____. a. aqueous b. deliquescent c. hygroscopic d. efflorescent ____ 5. Predict which one of the following compounds would be insoluble in water. a. NaCl b. HCl c. CF d. CuSO

  3. ____ 7. To increase the solubility of a gas at constant temperature from 1.30 g/L, at 2.6 atm, to 1.7 g/L, the pressure would have to be increased to ____. a. 3.4 atm b. 0.50 atm c. 0.29 atm d. 2.0 atm ____ 8. The solute in a colloidal suspension is called the ____. a. dissolving phase c. dispensing phase b. dispersed phase d. dispersion medium ____ 9. What type of compound is always an electrolyte? a. polar covalent b. nonpolar covalent c. ionic d. network solid ____ 10. Surface tension ____. a. is the inward force which tends to minimize the surface area of a liquid b. may be increased by detergents c. is decreased by hydrogen bonding d. causes beads of water to spread out ____ 11. How much heat is absorbed when 9.90 g of water melts? a. 33.1 kJ b. 0.331 kJ c. 3.31 kJ d. 33.1 J ____ 12. Which of the following pairs of factors affects the solubility of a particular substance? a. temperature and the nature of solute and solvent b. temperature and degree of mixing c. particle size and degree of mixing d. particle size and temperature

  4. ____ 13. Which symbol is used to connect the formula of the compound with the number of water molecules in a hydrate? a. a parenthesis c. a multiplication symbol b. an asterisk d. a dot ____ 14. If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in solution? a. 8.0 g b. 50 g c. 80 g d. 800 g ____ 15. In a concentrated solution there is ____. a. no solvent c. a small amount of solute b. a large amount of solute d. no solute ____ 16. An electric current can be conducted by ____. rubbing alcohol b. a sugar solution c. a salt solution d. methane gas ____ 17. If a crystal added to an aqueous solution causes many particles to come out of the solution, the original solution was ____. a. unsaturated b. saturated c. an emulsion d. supersaturated ____18. The fact that ice is less dense than water is related to the fact that ____. a. the molecular structure of ice is much less orderly than that of water b. the molecules of ice are held to each other by covalent bonding c. ice has a molecular structure in which water molecules are arranged randomly d. ice has a molecular structure that is an open framework held together by hydrogen bonds

  5. ____ 19. The volume of alcohol present in 740 mL of a 65.0% (v/v) solution of alcohol is ____. a. 481 mL b. 675 mL c. 259 mL d. 65.0 mL ____ 20. What occurs in solvation? a. Solute ions separate from solvent molecules. b. Solvent molecules surround solute ions. c. Solvent molecules bind covalently to solute molecules. d. Ionic compounds are formed. Short Answer (Use your own paper to answer the following) 21. At what temperature does liquid water have its maximum density? 22. What is the freezing point of a solution that has 5.0 moles of NaI in 1250 g of water? (K = 1.86 C/m; molar mass of water = 18.0 g) 23. What is the angle between the bonds of a water molecule? 24. How many liters of a 0.30M solution are needed to give 2.7 moles of solute? 25. If the volume of solute is 6.0 mL and the volume of solution is 300.0 mL, what is the solute's percent by volume?

  6. Numeric Response 26. How many phases are present in a colloid? 27. How many water molecules are in 39 formula units of calcium chloride dihydrate (CaCl2 ● 2H2O)? Essay 28. Define the terms solute, solvent, and aqueous solution. Provide an example of each. 29. Explain what a saturated solution is. Give a specific example. 30. Compare and contrast molarity and molality.

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