Separating Insoluble Mixtures

Question 1

Magnetic Separating

Answer 1

If one component of the mixture has magnetic properties, use a magnet to separate the mixture. Please note: Not all metals are magnetic: Iron, nickel and cobalt are all magnetic.
Example:
Using a magnet to separate nails from wood chips.

Question 2

If one component of the mixture has magnetic properties, use a magnet to separate the mixture. Please note: Not all metals are magnetic: Iron, nickel and cobalt are all magnetic.
Example:
Using a magnet to separate nails from wood chips.

Answer 2

Magnetic Separating

Question 3

Centrifugation separation

Answer 3

A mixture can be separated by spinning it very quickly. This method is called centrifuging. Centrifuges can separate suspensions. When the suspension has been centrifuged the denser particles will end up at the bottom.
Example:
Separating blood

Question 4

A mixture can be separated by spinning it very quickly. This method is called centrifuging. Centrifuges can separate suspensions. When the suspension has been centrifuged the denser particles will end up at the bottom.
Example:
Separating blood

Answer 4

Centrifugation separation

Question 5

Filtration Separation

Answer 5

Filtration uses a filter, a filter is a barrier with many small holes. The liquid and gas can pass through however, solids are caught.
Example:
Taking chalk mixed with water.

Question 6

Filtration uses a filter, a filter is a barrier with many small holes. The liquid and gas can pass through however, solids are caught.
Example:
Taking chalk mixed with water.

Answer 6

Filtration Separation

Question 7

Gravity Separation

Answer 7

Gravity separation is using gravity to separate heavier substances from a suspension. The heavier particles sink to the bottom of the container.
Example:
Panning for gold.

Question 8

Gravity separation is using gravity to separate heavier substances from a suspension. The heavier particles sink to the bottom of the container.
Example:
Panning for gold.

Answer 8

Gravity Separation

Question 9

Decantation

Answer 9

Decantation is a type of separation that lets suspensions of solids or liquids separate naturally. The top layer can be then poured or scraped off.

Question 10

Decantation is a type of separation that lets suspensions of solids or liquids separate naturally. The top layer can be then poured or scraped off.

Answer 10

Decantation

Question 11

Chromatography

Answer 11

is a process that can separate a mixture - usually colours or ink - by making it move through another substance like a paper strip.

Question 12

is a process that can separate a mixture - usually colours or ink - by making it move through another substance like a paper strip.

Answer 12

Chromatography

Question 13

Why does chromatography work?

Answer 13

The colours could be separated because of the different chemicals in the ink mixtures are attracted to the paper by different amounts. Substances strongly attracted do not move very far, however, weakly attracted move the furthest.

Question 14

Evaporation

Answer 14

the process by which a liquid is changed into its vapour state. This method is used to separate a solid that is soluble in a liquid. The method involves heating the mixture until the liquid evaporates completely, leaving behind the solid residue.

Question 15

the process by which a liquid is changed into its vapour state. This method is used to separate a solid that is soluble in a liquid. The method involves heating the mixture until the liquid evaporates completely, leaving behind the solid residue.

Answer 15

Evaporation

Question 16

a method used to separate a soluble solid from a solution through evaporation of the solvent. For example, a salt solution can be heated to remove the water by evaporation leaving behind the crystals of pure salt.

Answer 16

Crystallisation

Question 17

Crystallisation

Answer 17

a method used to separate a soluble solid from a solution through evaporation of the solvent. For example, a salt solution can be heated to remove the water by evaporation leaving behind the crystals of pure salt.