1 b) Elements, Compounds & Mixtures

Question 1

Compound

Answer 1

Two or more elements chemically combined in fixed proportions.

Question 2

Fractional Distillation

Answer 2

Process to separate two liquids of similar boiling points.

Question 3

Paper Chromatography

Answer 3

Process to separate a mixture of coloured substances.

Question 4

Rf Value

Answer 4

Calculated as the distance moved by a spot divided by the distance moved by the solvent front on a chromatogram.

Question 5

Simple Distillation

Answer 5

Process used to separate two liquids of different boiling points, or solvent from a solution.

Question 6

Chromatogram

Answer 6

Absorbent paper showing the separation of different coloured substances.

Question 7

Crystallisation

Answer 7

Process in which a solute (soluble solid) is obtained from its solvent.

Question 8

Element

Answer 8

Cannot be split into anything simpler containing atoms of the same atomic number.

Question 9

Filtrate

Answer 9

Liquid that comes through the filter paper during filtration.

Question 10

Filtration

Answer 10

Process to separate an insoluble solid from a liquid.

Question 11

Fractionating Column

Answer 11

Equipment used for separating vapours in fractional distillation.

Question 12

Liebig Condenser

Answer 12

Equipment used to condense gas to liquid in distillation.

Question 13

Miscible

Answer 13

Can mix with each other

Question 14

Residue

Answer 14

Solid left on the filter paper during filtration.