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Chapter 11
Solubility and Colligative Properties
Concentration Calculations
100

List the IMFs in terms of increasing strength.

What are dispersion forces, dipole-dipole, hydrogen bonding, & ion-dipole
100

Define colligative properties.

What is a property that depends on the number of particles dissolved in solution, not on the type of particle.
100

List the formulas for molarity, molality, percent by mass, mole fraction.

What are?

mol of solute/ L of solution

mol of solute/ kg of solvent

mol solute/mol of solution

mass solute/mass solution * 100

200

Determine the intermolecular forces present in H2O.

What is hydrogen bonding, dispersion forces, and dipole-dipole
200

Which substance would you expect to be more soluble in H2O? CH3CH2CH2CH2OH or HOCH2CH2OH

What is HOCH2CH2OH.

200

Household hydrogen peroxide is an aqueous solution containing 3.0% hydrogen peroxide by mass. What is the molarity of this solution. Assume density is 1.02 g/mL.

What is 0.89 M
300

What is the density, strength of intermolecular forces, volume of a gas, liquid, and solid?

Gases- weak IMFs, indefinite shape & volume, and low density

Liquid- moderate IMFs, indefinite shape, definite volume, high density

Solid- strong IMFs, definite shape & volume, high density

300

A glucose solution contains 55.8 g of glucose (C6H12O6) in 455 g of water. Determine the freezing point of the solution. Assume the density is 1.00g/mL of water.

What is -1.27 degrees Celsius

300

An aqueous NaCl solution is made using 112 g of NaCl diluted with 1.00 L of water. Calculate molality. Assume density of water 1.08 g/mL.

What is 2.0 m

400

Describe the 5 segments of the heating curve of water.

Segment 1- ice is warmed to its melting point

Segment 2- melting point added heat does not change temperature

Segment 3- water is warmed to boiling point

Segment 4- boiling point, added heat does not change temp

Segment 5- steam warming occurs

400

An aqueous solution containing 17.5 g of unknown molecular (non electrolyte compound in 100.0 g of water has freezing point of -1.8 degrees Celsius. Calculate molar mass of the unknown.

1.8 * 102 g/mol

400

A hard water sample contains 0.00085% Ca by mass (Ca2+ cations). How much water in grams contains 1.2 g Ca?

What is 1.4 * 104 g