AlchemyName ______

Mr. KoevalDate ______Per ____

Test: Solutions 14

On my honor, I have consulted with no one else and have done this test on my own. Sign ______

Bubble the letter of the best answer on your scantron or write the letter of the correct answer to the left of the number.

  1. A heterogeneous mixture with particles that will settle out is called a

a. solutionb. suspensionc. colloidd. slurry

  1. Two sugar cubes are dissolved in a cup of tea. The tea is the

a. soluteb. solventc. solutiond. slurry

  1. A substance that conducts electricity when dissolved in water is a(n)

a. electrolyteb. colloidc. zwitteriond. conductor

  1. Randomness or disorder is

a. entropyb. enthalpyc. solvationd. the Tyndall Effect

  1. Two liquids are mixed but will not dissolve in each other. These liquids are

a. covalentb. nonelectrolytesc. nonpolard. immiscible

  1. A solution that has the ability to dissolve more solute at the current conditions is called

a. solvatedb. saturatedc. supersaturatedd. unsaturated

  1. A crystal of solute is added to the solution in #6. What would you expect to happen?
  2. the crystal would dissolve
  3. the crystal would sink to the bottom unaffected
  4. the solution would begin to crystallize excess solute
  5. the solution would explode
  1. The amount of a substance required to form a saturated solution with a given amount of solvent at a given temperature is the _____ of the substance.

a. solubilityb. entropyc. enthalpyd. miscibility

  1. Toluene dissolves wax. Water will not dissolve wax. What can you conclude about toluene?

a. it has a high miscibility quotient

b. it is polar

c. it is nonpolar

d. it has a lot of entropy

  1. During solution formation, which of these processes releases heat?
  2. solute-solute breakup
  3. solvent-solvent breakup
  4. solvent-solute interaction (solvation)
  5. formation of the coordination compound
  1. The graph at the right depicts a process that is overall

a. isothermicb. poikilothermicc. endothermicd. exothermic

  1. Which of the following favors something dissolving?

a. a large difference in the polarity of the solvent and solute (opposites attact)

b. decrease in entropy

c. release of heat

d. all of these

For 13-17, bubble or writeA if the solubility is increased, B is the solubility is decreased, or C if the solubility is not affected.

  1. How does a decrease in pressure affect the solubility of carbon dioxide in water?
  1. How does a decrease in temperature affect the solubility of sugar in water?
  1. How does an increase in temperature affect the solubility of oil in gasoline?
  1. How does a decrease in pressure affect the solubility of salt in water?
  1. How does an increase in temperature affect the solubility of a gas in a liquid?
  1. Which is a solution?

a. saltwaterb. Italian salad dressingc. milkd. bromine

  1. Which of these would be an electrolyte?

a. C12H22O11b. C2H5OHc. C6H6O6d. Ca(NO3)2

  1. When a soda is opened and poured, bubble of gas can be observed escaping from the solution. This is called

a. evanescenceb. efflorescencec. essenced. effervescence

  1. Which of these would generally slow down the rate at which a solution forms?
  2. crushing the solute
  3. cooling the solvent
  4. stirring the solvent
  5. choosing a solute and solvent with very similar polarities
  1. Referring to Chart 1, what is the solubility of LiCl in 100g of water at 60oC?

a. 100gb. 120gc. 230gd. 150g

  1. If 50g of KNO3 are dissolved in 100g of water at 50oC, a _____ solution forms. Use chart 1.

a. unsaturatedb. saturatedc. supersaturatedd. cannot be determined

  1. At what temperature in oC are 200g of CsCl just soluble in 100g of water? Use chart 1.

a. 20b. 32c. 43d. 55

  1. Using Chart 2, what is the solubility of AgNO3 in 100g H2O at 80oC?

a. 122gb. 311gc. 585gd. 733g

  1. A saturated soln of KCl is prepared in 100g of H2O at 100oC. What mass of KCl will crystallize if the soln is cooled to 20oC? Use Chart 2.

a. 5gb. 10.5gc. 16.2gd. 22.1g

  1. A textbook question says: “204g of sucrose are dissolved in water at 20oC. Is the resulting solution saturated, unsaturated, or supersaturated?” The answer

a. is “unsaturatedb. is “saturated”c. is “supersaturated”d. cannot be determined

  1. Which solution is most concentrated?

a. 10mL of 12M HClb. 20mL of 6M HCl

c. 40mL of 3M HCld. they are all the same

  1. 10g of salt are dissolved in 100g of water. The resulting solution would have a freezing point that is ____ than normal, a boiling temperature that is ____ than normal, a vapor pressure that is ____ than normal, and an osmotic pressure that is ____ than normal.
  2. higher…higher…higher…higher
  3. lower…lower…lower…lower
  4. lower…higher…lower…higher
  5. higher…lower…higher…lower

For 30-34, you must neatly show work, including units and a circled answer, to receive credit.

  1. Coca-cola contains 39g of sugar (C12H22O11) per 355mL can. What is the M of sugar in Coke?
  1. What volume of 6M HCl solution would be needed to provide 100g HCl?
  1. What mass (in grams) of NaOH must be dissolved to make 500mL of a 6M solution?
  1. How many mL of 12M HCl are needed to make the 50mL of 3M HCl?
  1. 200mL of 12M HCl are diluted to a volume of 500mL What is the M of the resulting solution?

Formulas:

M = mol soluteM1V1 = M2V2

L soln