Separation Techniques - Lesmahagow High School

Separation Techniques QUIZ Questions 1 Which technique can be used to separate 2 liquids with different boiling points? Distillation

2 Which liquid, water or alcohol, has a lower boiling point (and boils first)? Alcohol 3 Which

technique separates substances based on how well they dissolve in a particular solvent? Chromatography 4 In felt-tip pen chromatography

which colour of pen was actually a mixture of the MOST colours of ink? Black 5 In the diagram below which spot was most soluble (i.e. dissolved best) in the solvent?

Spot A Spot B Spot C x Spot A 6

In chromatography of biro pen ink which solvent was best to carry the ink up the paper? Meths 7 What do we call a substance that cannot dissolve in a solvent?

Insoluble 8 Which technique can be used to separate an insoluble solid from a liquid? Filtration 9

Which technique can be used to separate a soluble solid from the liquid it is dissolved in? Evaporation 10 A Put the following 6 steps for

separating sand and salt into the correct order Heat filtrate to evaporate off the solvent (water) B Pour salt water filtrate into an evaporating basin on a tripod over a Bunsen burner C Filter to remove the insoluble sand D Place the sand/salt mixture into a beaker and

add water E Allow basin to cool & collect salt F Stir to allow the salt to dissolve in the water D F

C B A E