A basic kinetic study of a chemical reaction often involves conducting the reaction at varying concentrations of reactants. In this way, you can determine the order of the reaction in each species, and determine a rate law expression. Once you select a reaction to examine, you must decide how to follow the reaction by measuring some parameter that changes regularly as time passes, such as temperature, pH, pressure, conductance, or absorbance of light. In this experiment we will use color change to derive the initial rates of the reaction. Before coming to lab you should read in your text the section on ...
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Introduction
During the Solubility Product experiment you calculated the Solubility Product, Ksp, for calcium hydroxide, an ionic solid that is sparingly soluble in water. This was achieved by titrating a saturated solution of Ca(OH)2 prepared at a certain temperature. The saturated, aqueous, solution of Ca(OH)2 is represented in equation form as shown below.
The equilibrium expression for calcium hydroxide is shown below.
Ksp = [Ca2+][OH–]2 Eq. 1 Equilibrium constants are temperature-dependent and the value of an equilibrium constant can be related to temperature and the Gibbs Free Energy, Gº, through the equation: ∆G°=-RTlnK Eq. 2 In this case we can substitute our ...