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Ka and weak acids
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What weak really means

What weak really means

Particle-level view of a weak monoprotic acid in water showing many HA molecules, few H+ and A- ions, the equilibrium equation, and the Ka expression A weak acid only partially dissociates in water, so an equilibrium is set up: HA(aq)⇌H+(aq)+A−(aq)HA(aq) \rightleftharpoons H^+(aq) + A^-(aq)HA(aq)⇌H+(aq)+A−(aq). At equilibrium, most particles are still HAHAHA, so a weak acid of a given concentration produces fewer hydrogen ions than a strong acid of the same concentration.

Ka and weak acids Lesson

  1. A Level
  2. /Chemistry
  3. /Ka and weak acids

Step-by-step lessons covering Edexcel A Level Chemistry Ka and weak acids for A Level Chemistry. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.