C1 (Separating Mixtures)

Question 1

Chromatography

Answer 1

• separates dissolved mixtures
• eg. Inks and food colouring
• some coloured substances dissolve better in the certain solvents than others
• pure substance one spot
• two substances will be the same if the produce the same colour
  1) pencil line draw, spots ink placed
  2) places in solvent, travels up paper
  3) coloured substances spread

Question 2

Evaporation

Answer 2

1) have dissolved salt in water under bunsen burner
2) boil the water leaving salt
3) can collect the water

Question 3

Filtration

Answer 3

1) take water and insoluble substance (sand)

2) put through filter paper and the water will pass through, but leaves the sand behind

Question 4

Fractional distillation

Answer 4

1) removes liquid from two or more other
2) water and ethanol solution heated
3) water evaporates first and leaves ethanal solution behind
4) then condensed and collected seperately

Question 5

Simple distillation

Answer 5

1) separating solvents from mixtures
2) heat the water, evaporates, collected and condenses
3) leaves salt and water seperately