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11.9: Homework Solutions

Last updated

Mar 16, 2022
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- 11.9: Solutions, Colloids and Membranes- Questions
- 11.S: Solutions (Summary)

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Mixtures and Solutions

(01)

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

molecule
molecule
molecule
electrolyte
electrolyte

(03)

solute is CO₂ & solvent is H₂O
solute is NaCl & solvent is H₂O
solute is sugar & solvent is H₂O
solute is sodium bicarbonate & solvent is H₂O
solute is O₂ & solvent is air (mostly N₂)

Solution Concentrations

(04)

0.6 g/L glucose
1850 mcg/mL cholesterol
1.42 mg/L iron
0.1 g/L blood alcohol
1.50 x 10³ mcg/mL sodium ions

(05) 12.5 g glucose

(06) 115 mL

(07)

0.86 mol/L
7.0 x 10² mol/L
8 mmol/mL
900 mol/L
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)

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

Membranes, Osmosis and Dialysis

(18)

Water moves from B to A
Water moves from B to A
Water moves from A to B

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

(20)

Hypotonic into Hypertonic
Hypotonic into Hypertonic
no flow

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

(22) 7.8 M Al³⁺

Mixtures and Solutions

Solution Concentrations

Converting Between Different Concentration Units

Colloids and Suspensions

Membranes, Osmosis and Dialysis

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