c2.1 purity and separating mixtures

Question 1

Alloy

Answer 1

a mixture of a metal and at least one other element.

Question 2

Balanced chemical equation

Answer 2

a model for a reaction showing formulae and number of units for all substances involved.

Question 3

Boiling point

Answer 3

the temperature at which a substances changes from the liquid state to the gas state.

Question 4

Carrier gas

Answer 4

an unreactive or inert gas used as the mobile phase in gas chromatography.

Question 5

Chemical formula

Answer 5

a description of a compound or an element that uses symbols to represent the atoms present. Number show if more than one atom of an element is present.

Question 6

Chromatogram

Answer 6

the pattern produced when separating a mixture using chromatography.

Question 7

Chromatography

Answer 7

a separation method that relies on the distribution of a substance between a mobile phase and a stationary phase.

Question 8

Condense

Answer 8

to change from the gas state to the liquid state.

Question 9

Condenser

Answer 9

apparatus that can cool and condense a substance.

Question 10

Crystallisation

Answer 10

the process by which crystals are formed during evaporation of a solvent from a solution

Question 11

Dissolve

Answer 11

the process in which a solute and solvent mix completely to form a solution.

Question 12

Empirical formula

Answer 12

formula showing the simplest whole-number ratio of the atoms of each element in a compound.

Question 13

Evaporate

Answer 13

when a substance turns from the liquid state to the gas state at a temperature below the boiling point.

Question 14

Filtrate

Answer 14

liquid that passes through the filter during filtrations.

Question 15

Filtration

Answer 15

the process by which insoluble substances are separated from soluble substances using a filter.

Question 16

Fraction

Answer 16

in chemistry, substance separated during fractional distillation.