Measuring solubility [chemistry only]
2 marks · NormalState the meaning of the following:
solution
saturated solution
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(a) A solution is a liquid mixture in which the solute is dissolved in the solvent. · must show Mixture of solute and solvent, Liquid
(b) A saturated solution is one that contains as much dissolved solid as possible at a given temperature, with some undissolved solid present. · must show As much dissolved solid as possible, At a particular temperature, Some undissolved solid present
Also accept: For saturated solution, accept: contains as much dissolved solute as possible at that temperature, with some undissolved solid.
Common mistakes: Forgetting to mention 'as much dissolved solid as possible' for saturated.
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Marking points
B1 (a) · 1 mark · Correctly states the meaning of 'solution'.
B1 (b) · 1 mark · Correctly states the meaning of 'saturated solution'.
Worked solution
a) A solution is a liquid in which a solute has dissolved in a solvent. b) A saturated solution contains as much dissolved solute as possible at that temperature, with some undissolved solute present.