Unit 7

Question 1

Aqueous

What is the most common solvent?

Answer 1

When substances are in a solution with water

Wate

Question 2

Distillation

Answer 2

Separation used for a mixture of liquids that separate components based on the boiling points

Question 3

Centrifuge

Answer 3

Rapidly spins mixtures and separates by densities

Question 4

Mixture

Heterogenous and homogenous mixtures

Answer 4

Mixture: physical blend of 2 or more pure substances
Heterogenous: non uniform composition
Homogeneous(solution): uniform composition

Question 5

Decant

Answer 5

Pouring a liquid and leaving a solid behind

Question 6

Filtration

Answer 6

Pouring a mixture through filter paper, small particles pass through, large particles get trapped

Question 7

Suspension

Answer 7

A dispersion of large particles that are temporarily suspended and settle out naturally over time
Ex: salad dressing, orange juice with pulp

Question 8

Colloid

Answer 8

Consists of 2 phases of matter and are heterogenous on a microscopic level, hard to see with a naked eye
Ex: milk, spray paint, whipped cream

Question 9

Solute

Solvent

Answer 9

Solute: substance that is being dissolved
Solvent: substance that does the dissolving

Question 10

How can you tell solutions and colloids apart?

Answer 10

Solutions are clear, colloids are cloudy

Question 11

Solubility

Answer 11

Amount of solute that dissolve in a given amount of solvent

Question 12

Factors that affect solubility

Answer 12

1. Temperature: increasing temperature increases solubility
2. Agitation: stirring the solution increases solubility
3. Surface area: smaller particles=dissolves quicker

Question 13

Saturated solution

Answer 13

Contains the maximum amount of solute for a given amount of solvent at a constant temperature

Question 14

Unsaturated solution

Answer 14

Contains les solute than a given amount of solvent can dissolve

Question 15

Supersaturated solution

Answer 15

Contains more than the maximum amount that a given amount of solvent can dissolve

Question 16

Factors affecting solubility of gases

Answer 16

1. As agitation increases, solubility decreases
2. As temperature decreases, solubility increases
3. As pressure increases, solubility increases

Question 17

The solubility rule

Answer 17

Polar substances dissolve other polar substance, non polar substances dissolve other non polar substances

Question 18

Solvation

Answer 18

The surrounding of solute particles by solvent particles

Question 19

Concentration

Answer 19

a measure of the amount of solute that is dissolved in a given amount of solvent

Question 20

Dilute

Answer 20

Contains a low ratio of solute to solution (small concentration of solute)

Question 21

Concentrated

Answer 21

Contains a high ration of solute to solution (high concentration of solute)

Question 22

Molarity

Answer 22

the number of moles to solute dissolved per liter of solution

Question 23

Molarity equation

Answer 23

M= mol/L
L=mol/M
mol=ML

Question 24

In diluting solution, the concentration is
The total # of ___ remains unchanged
Equation:

Answer 24

decreased
moles of solute
M1V1=M2V2