Seperating Techniques

Question 1

Filtration

Answer 1

Separates a solid from a liquid, substance left on paper is the residue, liquid that comes through is the filtrate

Question 2

Crystallisation

Answer 2

Separates a solute from a solution (e.g. sodium chloride from sodium chloride solution)

Question 3

How to obtain pure salt

Answer 3

Use filtration and crystallisation to obtain pure salt from rock salt

Question 4

Simple distillation

Answer 4

Separates the components of a solution (collects liquid at the end))

Question 5

Fractional Distillation

Answer 5

Separates a mixture of liquids

Question 6

Paper Chromatography

Answer 6

Separates a variety of mixtures, (coloured inks)

Question 7

Practical: Paper Chromatography

Answer 7

Draw line in pencil 1cm above paper. Put a spot of ink and allow to dry. Suspend in solvent (not above pencil line) and allow to dissolve. Leave paper to dry.

Question 8

Retardation Factor

Answer 8

distance moved by a spot / distance moved by the solvent front