6 x 1 hour lessons

This module develops your understanding of acids, bases, and pH. You’ll revise Brønsted-Lowry theory, practise pH calculations for strong and weak acids and bases, and use the ionic product of water. You’ll also explore how buffer solutions work and interpret titration curves, including how to select suitable indicators. These are essential skills for both written exams and practical questions.

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By the end of this module you will be able to:

• define acids and bases using the Brønsted-Lowry model

• calculate the pH of strong and weak acids and bases

• use the ionic product of water (Kw) in calculations

• calculate Ka for weak acids and interpret what it means

• describe how buffer solutions work and perform related pH calculations

• interpret titration curves for different combinations of acids and bases

• explain how indicators work and select appropriate ones for a given titration

AQA Specification Points: 1.35 Brønsted-Lowry acid-base equilibria in aqueous solution 1.36 Definition and determination of pH 1.37 The ionic product of water Kw 1.38 Weak acids and bases Ka for weak acids 1.39 pH curves, titrations and indicators 1.40 Buffer action