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2 pt

A. B. C. D. E. 1pt. 1 pt. 1 pt. 1pt. 1 pt. 2 pt. 2 pt. 2pt. 2pt. 2 pt. 3 pt. 3 pt. 3 pt. 3 pt. 3 pt. 4 pt. 4 pt. 4pt. 4 pt. 4pt. 5pt. 5 pt. 5 pt. 5 pt. 5 pt. When a few spoonfuls of sugar are mixed into a cup of water, water is the. solute solvent catalyst mixture.

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2 pt

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  1. A B C D E 1pt 1 pt 1 pt 1pt 1 pt 2 pt 2 pt 2pt 2pt 2 pt 3 pt 3 pt 3 pt 3 pt 3 pt 4 pt 4 pt 4pt 4 pt 4pt 5pt 5 pt 5 pt 5 pt 5 pt

  2. When a few spoonfuls of sugar are mixed into a cup of water, water is the • solute • solvent • catalyst • mixture

  3. b. solvent

  4. When iodine is dissolved in alcohol, what term is used to describe the iodine? • solute • solvent • mixture • suspension

  5. a. solute

  6. How is solute different from a solvent in a solution? • The solute is a solid and the solvent is a liquid • The solute is present in a greater amount • The solute is present in a smaller amount • There is no difference because the solute and solvent are in equal amounts in the solution

  7. c. The solute is present in a smaller amount

  8. A liquid mixture in which particles cannot be seen but scatter light beams is a • colloid • solution • suspension • catalyst

  9. a. colloid

  10. When you add so much solute that no more dissolves, you have a(n) • unsaturated solution • saturated solution • supersaturated solution • desaturated solution

  11. b. Saturated solution

  12. If 60 grams of solute is dissolved to make 100 grams of solution, what is the concentration of the solution? • 40% • 60% • 100% • 160%

  13. b. 60%

  14. Dissolving sugar in water is an example of a physical change because • Neither of the substances changes into a new substance • The sugar cannot be separated from water • The water cannot become saturated with sugar • Salt water is a different substance than either salt or water

  15. a. Neither of the substances changes into a new substance

  16. What is one way to increase the solubility of salt in water? • Chill the water • Increase the amount of salt • Heat the water • Increase the pressure

  17. c. Heat the water

  18. When a solute, such as salt, is added to a solvent, the freezing point of the solution is • raised • lowered • the same • is raised then lowered

  19. b. lowered

  20. How many grams of NaCl is soluble in 100 g of water at 90°C • 10g • 20g • 30g • 40g

  21. d. 40g

  22. Which substance is most soluble at 20°C • NaNO3 • CaCl2 • NaCl • KNO3

  23. a. NaNO3

  24. Which substance is least soluble at 50°C • Ce2(SO4)3 • NaCl • KCl • KClO3

  25. a. Ce2(SO4)3

  26. The solubility of which two substances is nearly the same at 30°C • NaCl and KNO3 • NaCl and KClO3 • NaNO3 and CaCl2 • NaCl and KCl

  27. d. NaCl and KCl

  28. When 80g of NaNO3 is dissolved in 100 g of water at 10°C, the solution is • unsaturated • saturated • supersaturated • None of the above

  29. b. saturated

  30. Which compound decreases in solubility as the temperature increases? • NaCl • KCl • NaNO3 • Ce2(SO4)3

  31. d. Ce2(SO4)3

  32. If the solution of KNO3 was cooled from 50°C to 10°C, how many grams of solute would precipitate out of solution? • 20g • 40g • 70g • 90g

  33. c. 70g

  34. A mixture in which particles can be seen and easily separated by settling or filtration is called a(n) • solvent • solution • colloid • suspension

  35. d. suspension

  36. Which is an example of a colloid? • Sugar water • Whipped cream • Snow globe • Italian salad dressing

  37. b. Whipped cream

  38. A mixture that contains a solvent and at least one solute is called a(n) • suspension • colloid • solution • catalyst

  39. c. solution

  40. Which of the following is a true statement about temperature and solubility • Most solids become less soluble as the temperature increases • Nitrogen dissolves better in cold water than in hot water • Most gases become more soluble as the temperature increases • Sugar dissolves better in cold water than in hot water

  41. b. Nitrogen dissolves better in cold water than in hot water

  42. You can make a dilute solution by • increasing the amount of solvent • increasing the amount of solute • decreasing the amount of solvent • heating the solution

  43. a. increasing the amount of solvent

  44. If two unidentified solids of the same texture and color have different solubilities in 100g of water at 20°C, you could conclude that • they are different substances • they are the same substance • their solubilities will be the same if the water temperature is increased • they have the same densities

  45. a. they are different substance

  46. How would a solute affect the boiling point of water? • The water will boil at a lower temperature • The water will boil at the same temperature • The water will boil at a higher temperature • None of the above

  47. c. The water will boil at a higher temperature

  48. When a solid compound dissolves in water • it breaks up into individual crystals • its particles surround individual water particles • each of its particles becomes surrounded by water molecules • each of the particles disappears

  49. c. each of its particles becomes surrounded by water molecules

  50. When 30g of NaCl is dissolved in 100 g of water at 90°C, the solution is • unsaturated • saturated • supersaturated • desaturated

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