Chemical equilibria are important in numerous biological and environmental processes. Some important aspects of equilibrium involving physical and chemical processes are dealt with in this unit 7 of class 11chemistry, along with the ionic equilibrium. We will learn in detail about equilibrium constants, reaction quotient, Le-Chatelier's principle, acids, bases, salts, pH, acid-base equilibria, buffer solutions, and solubility equilibria.
Curated by: Khan Academy India - English (44 videos)
"Why does a soda bottle fizz when you open it? And what happens when you add just one spoonful of sugar too many? The answer lies in a constant, invisible dance called dynamic equilibrium. In this video, we dive into the chemistry of solutions to explore physical equilibrium. Using clear examples, animations, and simulations, we’ll break down: 1. What happens at a molecular level when a solid dissolves in a liquid to form a saturated solution? 2. The concept of dynamic equilibrium, where the rate of dissolution equals the rate of crystallization. 3. How we can prove this invisible process using an experiment with radioactive tracers? 4. How pressure affects the solubility of gases in liquids, explained through Henry's Law? 5. The five key characteristics that define any system in physical equilibrium? Whether you're a chemistry student or just curious about the science behind everyday phenomena, this video will make equilibrium click! Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/chemistry/chemical-equilibrium Timestamps: 0:00 - Introduction: Equilibrium in Dissolution 0:08 - Solids in Liquids: Dissolving Sugar 0:18 - Saturated Solutions 0:49 - Dynamic Equilibrium: Dissolution & Crystallization 1:38 - Simulation 1: Visualizing Dynamic Equilibrium 3:05 - Effect of Temperature on Solubility 4:01 - How Can We Prove Dynamic Equilibrium? 4:24 - The Radioactive Sugar Experiment 5:36 - Simulation 2: Tracing Radioactive Sugar 6:37 - Gases in Liquids 6:50 - Why Carbonated Drinks Fizz: The Role of Pressure 7:46 - Henry's Law Explained 8:44 - Summary: Solids vs. Gases in Liquids 8:58 - 5 Characteristics of Physical Equilibrium 10:20 - Conclusion Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate"