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11.9: Homework Solutions

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    Mixtures and Solutions

    (01)

    1. F
    2. F
    3. F
    4. T
    5. F

    (02) Of the following examples of solutions, determine whether the solute is an electrolyte or a molecule.

    1. molecule
    2. molecule
    3. molecule
    4. electrolyte
    5. electrolyte

    (03)

    1. solute is CO2 & solvent is H2O
    2. solute is NaCl & solvent is H2O
    3. solute is sugar & solvent is H2O
    4. solute is sodium bicarbonate & solvent is H2O
    5. solute is O2 & solvent is air (mostly N2)

    Solution Concentrations

    (04)

    1. 0.6 g/L glucose
    2. 1850 mcg/mL cholesterol
    3. 1.42 mg/L iron
    4. 0.1 g/L blood alcohol
    5. 1.50 x 103 mcg/mL sodium ions

    (05) 12.5 g glucose

    (06) 115 mL

    (07)

    1. 0.86 mol/L
    2. 7.0 x 102 mol/L
    3. 8 mmol/mL
    4. 900 mol/L
    5. 1700 mmol/dL

    (08) 0.45 mol hydroxide & 0.15 mol aluminum ions

    (09) 1.3 mEq/L Cu2+; 0.36 mEq/L Mn4+; 1.6 mEq/L Zn2+

    (10) 0.40 Eq Ca2+; 0.40 Eq SO42-

    (11) 2.3 mL

    (12) 29 mL of 7.0g/10mL or 50. mL of 10g/25 mL

    (13) 1.3 mL/min

    (14) 0.19 mg/min

    (15) 33 mg/kg; yes the levels are within safe limits.

    Converting Between Different Concentration Units

    (16) 0.12 Eq/L of Ca2+; 0.12 Eq/L Cl-

    Colloids and Suspensions

    (17)

    1. Chocolate milk - solution and rice pudding - colloid
    2. Tuna salad - colloid and vinegar-based dressing - solution
    3. Light syrup - solution and pureed fruit - colloid
    4. Rocky road ice cream- colloid and fruit juice - solution
    5. Mashed potatoes - colloid and vegetable oil - solution

    Membranes, Osmosis and Dialysis

    (18)

    1. Water moves from B to A
    2. Water moves from B to A
    3. Water moves from A to B

    (19) ​isotonic: soluitons with equal total solute concentrations, therefore, NO osmosis

    (20)

    1. Hypotonic into Hypertonic
    2. Hypotonic into Hypertonic
    3. no flow

    (21) Water flows from the magnesium sulfate solution into the calcium chloride solution.

    (22) 7.8 M Al3+

    This page titled 11.9: Homework Solutions is shared under a not declared license and was authored, remixed, and/or curated by Dianne Bennett.