Quiz 8 Solutions

Karen Timberlake

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  1. Hydrogen bonds between water molecules

    2. Your answer:
    cause surface tension on the water surface
    allows water to dissolve ionic and polar compounds
    are attractions between a partially negative oxygen atom and a partially positive hydrogen atom
    all of the above

  2. A solution is made of 85.0 g of water and 5.0 g of NaCl.

    3. Your answer:
    The solute is water and the solvent is NaCl.
    The solute is NaCl and the solvent is the solution.
    The solute is NaCl and the solvent is water.
    Both NaCl and water are solutes.

  3. A strong electrolyte is a solute that

    4. Your answer:
    dissolves in water as molecules only
    dissolves in water as ions only
    dissolves in water as molecules and ions
    does not dissolve in water

  4. The number of equivalents in 1.0 mole of Fe3+ is

    5. Your answer:
    0 equivalents
    1 equivalents
    3 equivalents
    2 equivalents

  5. At 40oC,KI has a solubility of 160 g KI per 100 g of water. How many grams of KI are needed to prepare a saturated solution using 25g of water?

    6. Your answer:
    160 g KI
    80 g KI
    40 g KI
    20 g KI

  6. A solution contains 15 g sucrose (table sugar) and 60 g of water. What is the mass/mass % of the sucrose solution?

    7. Your answer:
    80% (m/m) sucrose solution
    15 % (m/m) sucrose solution
    25% (m/m sucrose solution
    20 % (m/m) sucrose solution

  7. How many grams of NaOH are needed to prepare 400. mL of a 15%(m/v) NaOH solution?

    8. Your answer:
    15 g NaOH
    27 g NaOH
    38 g NaOH
    60. g NaOH

  8. How many mL of a 5.0% glucose solution provide 80.0 g of glucose?

    9. Your answer:
    400 mL of 5.0% glucose solution
    1200 mL of 5.0% glucose solution
    100 mL of 5.0% glucose solution
    1600 mL of 5.0% glucose solution

  9. What type of mixture contains solute particles that are retained by a semipermeable membrane, but do not settle out upon standing?

    10. Your answer:
    mixture
    colloidal
    suspension
    solution

  10. A semipermeable membrane separates a 2% starch solution and an 8% starch solution.

    11. Your answer:
    Initially water will flow from the 2% starch solution to the 8% solution.
    The water level of the 8% solution will rise.
    The 8% starch solution will be diluted.
    All of the above.

  11. Red blood cells placed in a 5% NaCl solution will

    12. Your answer:
    not change in volume.
    hemolyze.
    dialyze.
    crenate.

  12. A 20.0 g sample of NaOH is used to make a 250 mL NaOH solution. What is the molarity of the NaOH solution?

    13. Your answer:
    8.0 M
    5.0 M
    2.0 M
    1.0 M

  13. How many grams of NaCl are needed to prepare 0.500 L of a 4.00 M NaCl solution?

    14. Your answer:
    58.5 g NaCl
    117 g NaCl
    2.00 g NaCl
    4.00 g NaCl

  14. How many mL of 5.00 M HCl solution is needed to provide 1.5 mole of HCl?

    15. Your answer:
    333 mL
    1500 mL
    300 mL
    750 mL

  15. Express the concentration of a 2.0 M NaOH solution as a mass/volume percent(%).

    16. Your answer:
    4.0 % (m/v) NaOH solution
    2.0 % (m/v) NaOH solution
    8.0 % (m/v) NaOH solution
    40% (m/v) NaOH solution

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