separation methods

Question 1

what is filtration used for

Answer 1

separate insoluble solid from a liquid

Question 2

what is crystallisation used for

Answer 2

separate soluble solid from a solution

Question 3

how do you crystallise a product

Answer 3

put in evaporating dish and heat. some water will evaporate and solution will get more concentrated.
once water evaporated crystals will form

Question 4

what is chromatography used for

Answer 4

used to separate dyes

Question 5

what is simple distillation used for

Answer 5

separating a liquid from a solution

Question 6

how is simple distillation separated

Answer 6

solution heated
lowest BP of solution evaporates
vapour then cooled, condensed and collected
rest of solution left in the flask

Question 7

an example of what simple distillation can be used for and what is a problem with it

Answer 7

pure water from seawater

only use to separate things with different boiling points

Question 8

what is fractional distillation used for

Answer 8

separate a mixture of liquids

Question 9

examples of what fraction distillation separates

Answer 9

crude oil at a refinery

Question 10

how is fractional distillation separated

Answer 10

put mixture in flask with a fractionating column and heat.
liquids have different boiling points so will evaporate at different temperatures
liquid with lowest BP evaporates first and then reaches the BP it will go to the top of the column