CBSE · Class 11 · Chemistry · Chapter 6

Equilibrium

Chemical and ionic equilibrium.

14 lessons 230 min
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Lessons in this chapter

  1. 1Physical Equilibrium and Dynamic ChangeSee how opposing physical processes keep a system steady while particles continue to move.
  2. 2How Chemical Equilibrium Is EstablishedFollow reacting particles and concentration graphs to understand why chemical equilibrium remains active.
  3. 3The Equilibrium Law and Concentration ConstantsBuild an equilibrium expression from experimental patterns and learn how it follows the balanced equation.
  4. 4Gas Pressures and Heterogeneous EquilibriaChoose the correct pressure or concentration expression and understand why pure phases are omitted.
  5. 5Using K, Q, and Gibbs EnergyPredict direction, calculate equilibrium composition, and connect the result to Gibbs energy.
  6. 6Changing an EquilibriumExplain how a system responds to added material, compression, heating, or a catalyst.
  7. 7Ionic Equilibrium and Models of Acids and BasesConnect ions in water with three useful ways of recognising acid–base reactions.
  8. 8Water, pH, and Measuring AcidityUse water’s ionization and the logarithmic pH scale to interpret acidic, neutral, and basic solutions.
  9. 9Weak Acids and Their IonizationCalculate weak-acid composition by combining ionization constants with conservation of material.
  10. 10Weak Bases and Conjugate ConstantsSolve base-ionization problems and use water’s ionic product to connect a base with its conjugate acid.
  11. 11Polyprotic Acids, Acid Strength, and Common IonsExplain stepwise proton loss, structural acid-strength trends, and suppression by an ion already present.
  12. 12Salt Hydrolysis and Buffer SolutionsPredict the pH of salt solutions and design mixtures that resist small pH disturbances.
  13. 13Solubility Products and PrecipitationUse dissolution equilibria to calculate solubility and predict when a solid will form.
  14. 14Chapter Summary and PracticeConnect the complete chapter through one equilibrium framework and a broad set of mixed problems.