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Learning objective

Explain how to assess neutrality, acidity, and alkalinity using color changes and pH with a universal indicator.

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Cambridge IGCSE Combined ScienceAcids, bases and saltsCore content

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Quick explanation

Explain how to assess neutrality, acidity, and alkalinity using color changes and pH with a universal indicator

  • This point belongs to The characteristic properties of acids and bases, especially The characteristic properties of acids and bases outcomes.
  • You need to be able to explain how to assess neutrality, acidity, and alkalinity using color changes and pH with a universal indicator.
  • The key ideas to know are Describe and Explain.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplain

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This objective helps connect The characteristic properties of acids and bases outcomes to exam-style questions, flashcards, and revision notes for The characteristic properties of acids and bases.

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Paper 3 structured question: The characteristic properties of acids and bases

Paper 3Theory (Core)2 marks

Description

Using Universal Indicator

A student adds a universal indicator to three different solutions: Solution A turns red, Solution B turns green, and Solution C turns blue.

  1. a

    Analyse Identify the pH range of each solution based on the color changes observed with the universal indicator.

    Aim for approximately 2 distinct marking points.

    [2]
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Cambridge IGCSECombined Science resources