Learning objective

Explain how to prepare insoluble salts through the process of precipitation.

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Exam focus

Cambridge IGCSE ChemistryAcids, bases and saltsSupplement contentPractical objective

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Quick explanation

This point belongs to Preparation of salts, especially Preparation of salts outcomes.
You need to be able to explain how to prepare insoluble salts through the process of precipitation.
The key ideas to know are Describe, Explain, and Investigate.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplainInvestigate

Why it matters

This objective helps connect Preparation of salts outcomes to exam-style questions, flashcards, and revision notes for Preparation of salts.

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Paper 6Alternative to PracticalPractical1 marks

Method

Mix equal volumes of barium chloride solution and sodium sulfate solution to form barium sulfate precipitate.

Step	Action
1	Measure equal volumes of barium chloride and sodium sulfate solutions.
2	Mix the solutions in a beaker.
3	Filter the mixture to collect the precipitate.
4	Wash the precipitate with distilled water.
5	Dry the precipitate.

a
State the independent variable in this experiment.
Your answer
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[1]

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