Chapter 8 Retest Date Tuesday May 19th

There will be a retest on Tuesday May 19th @ 11:55 AM in room G6 for any students who would like to improve their marks.

The test will be out of 20 marks and can raise your marks up to a 10% to a maximum of 70% on the test.

Please review the following:

1. Describe a solution in quantitative and qualitative terms; e.g., reduce a 30g/300ml solution to 10g/100ml, this would be a dilute solution (not a concentrated one) a concentrated solution would have an amount of solute that is more than half of the volume of the solvent e.g., 55g/100ml (p. 217)

2. Definitions of solubility: The term solubility has more than one meaning (p. 216)

a) Solubility is the relative ability for a solvent to dissolve a solute

b) Solubility is the maximum amount of a solute than can dissolve in a solvent at a given temperature

3. Saturation of solutions: There are three levels of saturation of solutions"

a) unsaturated: More solute can dissolve

b) saturated: No more solute can dissolve

c) super saturated: A saturated solution has been cooled below a critical temperature; more solute is dissolved than should be at that temperature

4. Factors affecting solubility and the rate of dissolving (p. 221-223)

a) temperature

b) stirring 

c) particle size

d) type of solute or solvent

e) volume of solute or solvent

4. Separating solutions and mechanical mixtures *use the textbook section 8.3 and package worksheets*

Separating solutions

a) evaporation

b) distillation

c) paper chromatography

Separating mechanical mixutres

a) sifting (solids from solids)

b) sorting (appearance)

c) magnetism (attraction to metals)

d) settling (gravity)

e) use a separating funnel (different densities of fluids)

f) filtering (different states of matter)

g) flotation (densities again)

5. All bolded key terms: e.g., alloy, soluble, insoluble, etc.