Reaction Mechanisms, Energy Profiles & Rate Laws | IB Chemistry HL May 2025 Q8

Track the species through a two-step mechanism, build its energy profile, and connect the slow step and fast pre-equilibrium to a rate law. Controlled concentration changes and collision theory complete the explanation. Complete visual walkthrough with all assessed parts. English subtitles are available. Source question: May 2025 IB Chemistry HL, Paper 2, Question 8 (9 marks). Paper code: 2225-6221. CHAPTERS 00:00 Follow the species through both elementary steps 02:27 Build a two-barrier profile with the correct baselines 05:04 The slow step and the fast pre-equilibrium 07:59 Test reaction orders by controlled concentration changes 10:12 Connect temperature to successful collisions per second Explore IBvia learning resources and expert support: https://ibvia.com/ IBvia is an independent educational provider and is not affiliated with or endorsed by the International Baccalaureate Organization. IB is a registered trademark of the International Baccalaureate Organization. #IBChemistry #Chemistry #IBvia