This chemistry video tutorial provides a basic introduction into reaction mechanisms within a chemical kinetics setting. It explains how to write the rate law expression for a reaction mechanism. A reaction mechanism consists of a series of elementary steps or elementary reactions whose rate law can be written from its molecularity - that is from the coefficients of the balanced reaction. The rate of a reaction mechanism is completely dependent on the slow step or the rate-determining step. This video explains how to substitute an intermediate when writing rate law expressions. It contains plenty of examples and practice problems. Access The Full 53 Minute Video: Direct Link to The Full Video: PDF Worksheet - 6 Questions: _________________________________ Chemical Kinetics - Free Formula Sheet: Chemistry 2 Final Exam Review: _________________________________ Chapter 12 - Video Lessons: Full 53 Minute Video on YouTube: Join The YouTube Membership Program: