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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Experimental design

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3

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3

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Experimental design

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Paper 3Theory (Core)3 marks

Understanding solutions and their components is fundamental in chemistry.

Description

Definitions of Solutions

A solvent dissolves a solute. A solute is dissolved in a solvent. A solution is a mixture of solutes in a solvent. A saturated solution has the maximum solute that can dissolve at a given temperature. Residue is the solid left after processes like evaporation, and filtrate is the liquid that passes through a filter.

  1. a

    Define Define the terms solvent, solute, and solution.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Experimental design

Paper 3Theory (Core)2 marks

Description

Separation Techniques

Residue is the solid that remains after filtration, while filtrate is the liquid that has passed through the filter.

  1. a

    Explain Explain the difference between residue and filtrate.

    Aim for approximately 2 distinct marking points.

    [2]