Outlining clock reactions and how they can be used to show how the concentration of reactants affects the rate of a reaction. The iodine clock (Harcourt-Esson) experiment using hydrogen peroxide, potassium iodide and sodium thiosulfate is shown, using experimental data to find the order of reaction with respect to iodide ions. Recap: 00:32 Measuring Rates of Reaction: 01:08 Clock Reactions: 02:19 Iodine Clock Reaction: 04:01 Finding Order of Reaction: 07:41 Summary: 09:57 Pages on : Relevant Videos: Orders of Reaction: Rate Equations: Rate Determining Step: Collision Theory: Thank you for watching - if you found the video useful, please like and subscribe!