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7.1 Introduction to Equilibrium

Part of Equilibrium in AP® Chemistry. Read the opening section, then create a free account for the full interactive lesson, practice, and progress tracking.

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Reversible Processes

Previously in AP Chemistry, we have only dealt with reactions that proceed in one direction, from reactants to products. However, a good amount of reactions are actually reversible, meaning they can also go in the direction of products to reactants. Water can evaporate into steam, but steam can also condense back into water. Some important examples could be the transfer of protons in acid-base reactions and the transfer of electrons in redox reactions. Reversible reactions can be shown with a double sided arrow: ↔{\leftrightarrow}.

In this unit

12 lessons

  1. 7.1Introduction to EquilibriumThis lesson
  2. 7.2Direction of Reversible ReactionsPreview lesson
  3. 7.3Reaction Quotient and Equilibrium ConstantPreview lesson
  4. 7.4Calculating the Equilibrium ConstantPreview lesson
  5. 7.5Magnitude of the Equilibrium ConstantPreview lesson
  6. 7.6Properties of the Equilibrium ConstantPreview lesson
  7. 7.7Calculating Equilibrium ConcentrationsPreview lesson
  8. 7.8Representations of EquilibriumPreview lesson
  9. 7.9Introduction to Le Châtelier’s PrinciplePreview lesson
  10. 7.10Reaction Quotient and Le Châtelier’s PrinciplePreview lesson
  11. 7.11Introduction to Solubility EquilibriaPreview lesson
  12. 7.12Common-Ion EffectPreview lesson

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