Separating Mixtures

Question 1

Physical change

Answer 1

No change in particles, just the particle arrangement and energy, easy to reverse e.g. mixing water and salt

Question 2

Chemical change

Answer 2

A chemical change reaction takes place amd new substance is formed, very difficult to reverse e.g. buring a match

Question 3

During a chemical reaction

Answer 3

The atoms rearrange to form a new substance. Might be seen by colour chnge,temperature change,light being emitted or bubbles

Question 4

Law of conservation of mass

Answer 4

Matter can be change from one form to another. During physical and chemical changes, thereis no overall change in mass

Question 5

Filtration

Answer 5

Used to separate small insoluble solids ( do not dissolve in a liquid ) from a liquid by using filter paper and a funnel to trap the solids

Question 6

Evaporation

Answer 6

Used to separate soluble solids ( dissolve in liquids) from a soluition by evaporating off the liquid to leave the solids. E.g. salt water. P169

Question 7

Distillation

Answer 7

Used to separate two liquids with different boling points such as alcohol (boils at 78) and water (100). Also used to separate a soluble from a liquid ( e.g. seawater) to give a pure sample of each. P169

Question 8

Chromatography

Answer 8

Used to separate a mixture of dissloved substance in a soluition.E.g. different colours in a black marker.p169

Question 9

Insoluble

Answer 9

Does not dissolve in a liquid

Question 10

Soluble

Answer 10

Dissolve in a liquid

Question 11

Residue

Answer 11

The soil left in the filter paper after filtration

Question 12

Filtrate

Answer 12

The clean water that comes after filtration

Question 13

Solvent

Answer 13

The liquid that a solid is dissolved into

Question 14

Solute

Answer 14

The solid that is left after evaporation

Question 15

Miscible

Answer 15

• Liquids that mix together e.g.
  alcohol and

Question 16

Liebig condenser

Answer 16

Piece of equipment used in