Le Chatelier's Principle: Exam Questions Solved
In this video, I explain everything you need to know about Le Chatelier's Principle for AS Chemistry 9701 (Unit 7: Chemical Equilibria). We cover how changes in concentration, pressure, and temperature affect the position of equilibrium, and then we solve actual Cambridge International (CIE) exam questions to show you how to apply this knowledge. 📝 What we cover in this video: Definition of Le Chatelier's Principle for A Level Chemistry. Effect of Concentration changes on equilibrium. Effect of Pressure changes (for gases). Effect of Temperature (Exothermic vs Endothermic reactions). Why Catalysts do NOT change the equilibrium position. SOLVED EXAM QUESTIONS: Step-by-step solutions for 9701 past paper questions. ⏳ Timestamps: [00:00] Recap of Le Chatelier's Principle & Concentration/Pressure Effects [02:37] Effect of Temperature on Equilibrium Position [05:30] Exothermic Reactions: Temperature & Equilibrium Shift [08:42] Effect of Temperature on Kc and Kp Values [09:45] Endothermic Reactions: Temperature & Equilibrium Shift [13:25] Temperature vs. Rate of Reaction (Important Distinction) [14:55] Effect of Catalyst on Equilibrium & Activation Energy [18:30] A Level Chemistry Past Paper Questions Walkthrough [19:10] Q1: Thermal Decomposition of Ammonium Chloride [22:46] Q2: Maximizing Yield in Methanol Synthesis [26:31] Q3: Lithium Nitride & Ammonia Production (Tricky Question) [31:23] Q4: Effect of Adding Acids/Bases on Equilibrium Position [38:52] Q5: Haber Process Yield vs. Temperature & Pressure Graphs [42:31] Q6: Interpreting Rate of Reaction & Yield Graphs [47:29] Standard Definition of Le Chatelier's Principle [49:02] Q7: Esterification Equilibrium & Kc Expressions Study Resources: Access the full AS Chemistry 9701 Playlist: [Insert Link to your Playlist] Download the worksheet used in this video: [Insert Link if applicable] #ASChemistry #9701 #LeChatelierPrinciple #ALevelChemistry #ChemicalEquilibrium #CIEChemistry #ChemistryExamHelp #chemceptual #urdu #education #aschemistry
