Seperating Mixtures

Question 1

Dissolved

Answer 1

describes a substance that has mixed completely with a liquid so that it is no longer visible. Dissolving requires the substance to separate into very small particles

Question 2

Solution

Answer 2

a mixture of a solute dissolved in a solvent. Solutions are transparent but may be coloured.

Question 3

Solute

Answer 3

The substance getting dissolved

Question 4

Solvent

Answer 4

The substance that is doing the dissolving

Question 5

Aqueous solutions

Answer 5

Solutions in which water is the solvent

Question 6

Soluble

Answer 6

A substance that can be dissolved

Question 7

Insoluble

Answer 7

A substance that can be dissolved

Question 8

Chemical reaction

Answer 8

A chemical change in which one or more new chemical substances is produced

Question 9

Concentrated

Answer 9

A solution containing a large amount of solute

Question 10

Saturated

Answer 10

Unable to dissolve any more solute

Question 11

Dilution

Answer 11

A process of adding more solvent to a solution to make it less concentrated

Question 12

Fair test

Answer 12

A method for determining an answer to a problem without favouring any particular outcome another name for a controlled experiment

Question 13

Pressure

Answer 13

A push or squeeze on an object

Question 14

Suspension

Answer 14

A mixture of a gas or liquid and an insoluble substance. The insoluble substance settles to the bottom when the mixture is left to stand

Question 15

Filtration

Answer 15

The process of separating suspended particles from fluid through a filter

Question 16

Sediment

Answer 16

A mixture of a gas or liquid and an insoluble substance. The insoluble substance settles to the bottom when the mixture is left to stand

Question 17

Residue

Answer 17

The insoluble object left on top of the liquid

Question 18

Filtrate

Answer 18

A process were bacteria and items are removed from liquids

Question 19

Centrifuging

Answer 19

Separating a mixture by rotating the container quickly. The heavier parts of the mixture move to the outside of the spinning container

Question 20

Separating funnel

Answer 20

A pear-shaped glass container, with a tap at its base, used to separate two liquids that do not mix. Opening the tap removes the bottom liquid and the liquid floating on top is left in the funnel

Question 21

Colloid

Answer 21

A mixture in which extremely small particles of one substance are spread evenly throughout another substance

Question 22

Emulsion

Answer 22

A colloid with droplets of one liquid spread evenly through another

Question 23

Decanting

Answer 23

Pouring liquid off the top when sediment has settled to the bottom of the container

Question 24

Sieving

Answer 24

Separating particles of different sizes by allowing the smaller particles to fall through holes in a container

Question 25

Separating funnel

Answer 25

A pear-shaped glass container, with a tap at its base, used to separate two liquids that do not mix. Opening the tap removes the bottom liquid and the liquid floating on top is left in the funnel

Question 26

Centrifuging

Answer 26

Separating a mixture by rotating the container quickly. The heavier parts of the mixture move to the outside of the spinning container

Question 27

Distillation

Answer 27

A separation technique that uses evaporation to separate substances. The mixture is heated so that one substance evaporates the vapour is collected and condenses into a liquid

Question 28

Water condenser

Answer 28

A glass device for cooling a gas to form a liquid. It is a tube within a tube the gas flows through the inner tube while water moves through the surrounding outer tube to cool the gas

Question 29

Distillate

Answer 29

The liquid collected during distillation when the evaporated substance condenses

Question 30

Distilled water

Answer 30

Pure water from a condensing steam

Question 31

Crystallisation

Answer 31

A separation technique that uses evaporation to separate the parts of a solution The solvent evaporates and leaves behind the solute as crystals

Question 32

Osmosis

Answer 32

The process of separating using a membrane through which one constituent cannot pass

Question 33

Paper chromatography

Answer 33

Method of separating a mixture of different colours the liquid soaks through the paper and carries the mixture with it some substances are carried faster than others so the substances are separated along the paper