Separation

Question 1

Name all the physical processes

Answer 1

Filtration
Evaporation
Chromatography
Distillation

Question 2

What is the name of CH4

Answer 2

Methane

Question 3

What is the process of evaporation

Answer 3

Is used to separate small amounts of two or more solids which are soluble in the same solvent. (Water changing from a liquid to a gas or vapour)

Question 4

What is the process of chromatography

Answer 4

Is used to separate a soluble solid and a liquid to obtain the solvent

Question 5

What is the process of filtration

Answer 5

Is used to separate an insoluble solid from a liquid. (Solid particles in a liquid removed by the use of a filter permitting the fluid to pass through but retaining the solid particles)

Question 6

What is the process of distillation?

Answer 6

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation

Question 7

What is a solution

Answer 7

A solute dissolved in a solvent

Question 8

What is a solute

Answer 8

A substance that is dissolved in a solvent

Question 9

What is a solvent

Answer 9

A liquid in which chemicals dissolve to make a solution (e.g water and ethanol)

Question 10

What’s an aqueous solution

Answer 10

Solution where a solute is dissolved in water

Question 11

Non aqueous solution

Answer 11

Solution where the solute is dissolved in a solvent that isn’t water (e.g ethanol)

Question 12

What three stages does involve distillation

Answer 12

Boiling - always describing particle movement + energies
Condensing - always describing particle movement + energies

Collecting

Question 13

Name all of the chemical changes

Answer 13

Colour change
New products formed
Effervescence
Exothermic - heat given out
Endothermic - heat take in

Question 14

Name the two physical changes

Answer 14

Only the state changes

No new substances found

Question 15

What happens during chromatography

Answer 15

The molecules separate into layers as the molecules pass through the filter. The mechanism of separation depends on the filtering method, which is determined by the kinds of molecules to be separated

Question 16

How do you calculate the distance in chromatography

Answer 16

Distance moved by (A) x distance moved by solvent front

Question 17

What is distillation

Answer 17

Used to separate a mixture of liquids if they have different boiling points