CHEM123L Lecture Notes - Lecture 3: Collision Frequency, Ionic Strength, Rate Equation
14 Jun 2015
School
Department
Course
Professor
Document Summary
This laboratory report aims to investigate the rate law for the reaction involving the oxidation of the iodide ion by the persulphate ion. The rate law is an expression that identifies the rate of a given reaction by influence of the concentration of the reactants in the reaction. The rate is proportional to the concentration of the reactants and is given by the equation: The reactants that are used in this experiment contain (nh4)2s2o8 and ki. The ammonium and potassium ions are in solution, however, they are non reacting agents. In addition, i2 is not completely dissociated into ionic species, thus the reaction equation is given by: If the amount of one of the species in the above reaction is measured at various time points, it could give us the necessary information to calculate the rate of the reaction. As a result of the time restriction on the laboratory, another way to measure the rate of the reaction is used.
