practicals

Question 1

how is crystillisation used to separate a soluble solid from a solution

Answer 1

-put solution in evaporating basin
-heat solution
-at point of crystillisation, remove basin and allow to cool
-crystals should start to form
-filter out the crystals
-leave in warm oven to dry

Question 2

how do you carry out a paper chromatography experiment

Answer 2

-draw a baseline on the paper
-add the ink at regular intervals
-put in beaker of a solvent
-place a lid on the container to stop the solvent evapourating

Question 3

how is simple distillation used to separate out solution

Answer 3

-heat solution
-vapour is cooled
-then collected

Question 4

how is fractional distillation used to separate a mixture of liquids