6 x 1 hour lessons

This module develops the skills needed to handle acid–base equilibria quantitatively. You’ll calculate pH for strong and weak acids and bases, work with Ka and Kw, explore buffer solutions, and apply pH curves and indicators in titration problems.

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By the end of this module you will be able to: • calculate pH of strong acids and strong bases • define and use Ka, pKa, and Kw • calculate the pH of weak acids using Ka • describe and explain the action of acidic and basic buffer solutions • calculate pH changes in buffer systems • sketch and interpret pH curves for strong/weak acid–base combinations • choose suitable indicators based on titration type • perform complex acid–base calculations

Edexcel Specification Points: Topic 12 – Acid–Base Equilibria