Cambridge IGCSE Chemistry practice

Paper 3 structured question: Preparation of salts

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Paper

Marks

Topic

Preparation of salts

Exam-style question

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Paper 3Theory (Core)1 marks

Understanding the properties of hydrated and anhydrous substances is essential in chemistry.

Description

Hydrated substances contain water molecules chemically bonded to them, while anhydrous substances do not contain any water.

a
State the definition of a hydrated substance.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)3 marks

Description

Hydrated substances are used in reactions where water is beneficial, while anhydrous substances are used where water must be avoided.

a
Explain the difference between hydrated and anhydrous substances.
Your answer
Aim for approximately 3 distinct marking points.
[3]