Solutions And Formation Of Crystals

Question 1

Solvent

Answer 1

A substance that dissolves other materials to form a solution

Question 2

Suspension

Answer 2

A mixture in which small solid or liquid particles are suspended in a liquid or gas
Eg muddy water (doesn’t dissolve)

Question 3

Dilute solution

Answer 3

One in which there is a small amount of solute in a large amount of solvent

Question 4

Concentrated solution

Answer 4

One in which there is a large amount of solute in a small amount of solvent

Question 5

Crystal

Answer 5

A solid with a regular shape, where the particles are arranged in a regular pattern

Question 6

Saturated solution

Answer 6

One that contains as much dissolved solute as possible at a given temperature

Question 7

Growing crystals

Answer 7

• add powder copper sulfate to water in a beaker until it no longer dissolved and sits at bottom, stir with spatula
• heat to 60C , add more, heat more until it’s saturated
• place half into a warm evaporating basin and let cool slowly : large crystals
• other half hold beaker under cold water : small crystals

Question 8

Crystallization

Answer 8

The formation of crystals When a hot saturated solution cools

Question 9

Solubility of a substance

Answer 9

The mass of the substance in grams that will dissolve in 100 g solvent at a fixed temperature

Question 10

Solubility curve

Answer 10

A graph showing how the solubility if a substance varies with temperature

Question 11

Electrical conductivity in solutions

Answer 11

Solid copper sulfate doesnt conduct bc charged particles are locked in fixed position
When dissolved in water, the charged particles are free to move and can conduct
COPPER SULFATE SOLUTION DISPLAYS ELECTRICAL CONDUCTIVITY
sugar solution doesn’t