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Learning objective

Sketch and explain pH curves for combinations of weak and strong monoprotic acids and bases.

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

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Topic

Acids and bases (A-level only)

Subtopic

pH curves, titrations and indicators (A-level only)

Aqa A Level ChemistryPhysical chemistry

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Understand this objective

Quick explanation

Sketch and explain pH curves for combinations of weak and strong monoprotic acids and bases

  • This point belongs to Acids and bases (A-level only), especially pH curves, titrations and indicators (A-level only).
  • You need to be able to sketch and explain pH curves for combinations of weak and strong monoprotic acids and bases.
  • The key ideas to know are pH curve.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

pH curve

Why it matters

This objective helps connect pH curves, titrations and indicators (A-level only) to exam-style questions, flashcards, and revision notes for Acids and bases (A-level only).

Quick student answer

Which of the following statements about the pH curve of a strong acid titrated with a strong base is true?

Direct answer

B. The equivalence point occurs at pH 7.

Key terms

  • pH: A measure of the acidity or basicity of a solution, defined as the negative logarithm of the hydrogen ion concentration.
  • Titration: A laboratory method used to determine the concentration of an unknown solution by reacting it with a solution of known concentration.

Common trap

Misidentifying the equivalence point: The equivalence point is where the reactants are in stoichiometric proportions, while the endpoint is indicated by a color change of the indicator.

Related questions

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