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Learning objective

Identify substances and evaluate their purity by using information about their melting and boiling points.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE ChemistryExperimental techniques and chemical analysisCore content

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Quick explanation

Identify substances and evaluate their purity by using information about their melting and boiling points

  • This point belongs to Separation and purification, especially Separation and purification outcomes.
  • You need to be able to identify substances and evaluate their purity by using information about their melting and boiling points.
  • The key ideas to know are Identify and Determine.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

IdentifyDetermine

Why it matters

This objective helps connect Separation and purification outcomes to exam-style questions, flashcards, and revision notes for Separation and purification.

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Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 3 structured question: Separation and purification

Paper 3Theory (Core)1 marks

Description

Melting Point Analysis

The student suspects that the sample may contain impurities.

  1. a

    State the effect of impurities on the melting point of a substance.

    Aim for approximately 1 distinct marking point.

    [1]
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