Search results
Learn about the dynamic nature, characteristics and factors of equilibrium in physical and chemical processes. Understand the concepts of equilibrium constants, pH scale, buffer solutions and ionic equilibrium with examples and exercises.
“Equilibrium” is the seventh chapter in the NCERT Class 11 Chemistry Textbook. Several important concepts, such as equilibrium constants, buffer solutions and the common-ion effect, are explained in this chapter.
- 3 min
- Chemical Equilibrium. In a chemical reaction chemical equilibrium is defined as the state at which there is no further change in concentration of reactants and products.
- Equilibrium in Physical Processes. (i) Solid-Liquid Equilibrium: The equilibrium is represented as. Rate of melting of ice = Rate of freezing of water. The system here is in dynamic equilibriums and following can be inferred.
- Equilibrium involving Dissolution of Solid in Liquid. Solution: When a limited amount of salt or sugar or any solute dissolves in a given amount of water solution is formed.
- Equilibrium between a Gas and its Solution in Liquid. This type of equilibrium can be seen by the following example: Let us consider a sealed soda water bottle in which C02 gas is dissolved under high pressure.
- Equilibrium in the Physical Process: The most important and familiar examples are the phase transformation process. Eg. \[solid\rightleftharpoons liquid\]
- General Characteristics of Equilibrium Involving Physical Processes: Following characteristics are common to the system at equilibrium for which the physical processes are discussed above
- Equilibrium in Chemical Processes: Compared to physical systems chemical reactions also attain a state of equilibrium. Those chemical reactions can occur both in forward and backward directions.
- Reversible Reactions. Consider a general case of a reversible reaction. \[A+B\rightleftharpoons C+D\] With passing time, there is a decrease in the concentration of reactants A and B, the increase in the concentration of products C and D which leads to a decrease in the rate of forward reaction and an increase in the rate of backward reaction.
- A liquid is in equilibrium with its vapours in a sealed container at a fixed temperature. The volume of the container is suddenly increased, (i) What is the initial effect of the change on the vapour pressure?
- What is K for the following reaction in state of equilibrium? Answer: More Resources for CBSE Class 11. NCERT Solutions. NCERT Solutions Class 11 Maths.
- Answer
- Write the expression for the equilibrium constant for each of the following reactions. Answer
Learn about chemical equilibria, equilibrium constants, reaction quotient, Le-Chatelier's principle, acids, bases, salts, pH, acid-base equilibria, buffer solutions, and solubility equilibria in this unit 7 of class 11 chemistry. Explore the concepts, definitions, examples, and practice questions with interactive exercises and videos.
Equilibrium Class 11 Notes - Chapter 7. According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 6. Equilibrium is attained when molecules leaving the liquid to vapour equals the molecules returning to the liquid from vapour. K c is the equilibrium constant.
