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Equilibrium — Chapter Summary

ICSE · Class 11 · Chemistry

Summary of Equilibrium for ICSE Class 11 Chemistry. Key concepts: Equilibrium in physical, A reversible reaction reaches and At constant temperature.

81 questions38 flashcards9 formulas & key relations5 concepts

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A comparison illustrating why physical equilibrium (like liquid-vapor equilibrium) can only be achieved in a closed system, not an open one, due to the containment of matter.
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Overview

Chemical equilibrium is the state reached by many reversible reactions in a closed vessel when the forward and backward reactions occur at the same rate and the concentrations of reactants and products remain constant. Physical equilibria such as solid-liquid, liquid-vapour, and solid-vapour systems

Key Concepts

Equilibrium in physical processes appears

Equilibrium in physical processes appears in systems like solid-liquid, liquid-vapour, and solid-vapour changes. The two opposite processes continue t

A reversible reaction reaches chemical equilibrium

A reversible reaction reaches chemical equilibrium when forward and backward reaction rates become equal and the concentrations of all species stop ch

At constant temperature

At constant temperature, the rate of a reaction is proportional to the product of active masses of reacting species, each raised to its stoichiometric

Kc is written using equilibrium concentrations

Kc is written using equilibrium concentrations, while Kp uses equilibrium partial pressures. For gaseous reactions, Kp and Kc are related by Kp = Kc(R

Q has the same form as

Q has the same form as the equilibrium constant expression but is calculated at any stage of the reaction. If Q=K, the system is at equilibrium; if Q<

Learning Objectives

  • Understand the meaning of physical and chemical equilibrium
  • Distinguish between irreversible and reversible reactions
  • Explain the dynamic nature and characteristics of equilibrium
  • Write equilibrium constant expressions using concentrations and partial pressures
  • Use the reaction quotient Q to predict the direction of a reaction

Frequently Asked Questions

What are the important topics in Equilibrium for ICSE Class 11 Chemistry?
Key topics in Equilibrium include Physical and Chemical Equilibrium, Henry's Law and Dissolution of Gases, Law of Mass Action, Equilibrium Constant, and Reaction Quotient, Types of Chemical Equilibria. Study these first, then practise questions on each for Class 11 exams.
How should I revise Equilibrium for Class 11 exams?
Learn the core ideas first, then work through the 81 practice questions on Equilibrium. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Equilibrium

All ICSE Class 11 Chemistry Chapter Summary

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