Equilibrium Constant Determination INTRODUCTION

Equilibrium Constant Determination INTRODUCTION Every chemical reaction has a characteristic condition of Equilibrium at a given temperature. If two reactants are mixed, they will tend to react to form products until a state is reached where the amounts of reactants and products no longer change. Under such conditions the reactants and products are in chemical Equilibrium and will remain so until the system is altered in some way. Associated with the Equilibrium state there is a number called the Equilibrium Constant , Keq, that expresses the necessary condition on the concentrations of reactants and products for the reaction. Consider the following idealized reaction, where a, b, c and d represent coefficients and A, B, C and D represent reactants and products.

ion. By spectroscopy and Beer’s Law, it is found that [FeSCN2+] at equilibrium is 1.50 x 10-4 M. To find Keq for the reaction from these data, it is convenient first to determine how many moles of reactant species were initially present before a reaction occurred. By the definition of the molarity of a species A, Liters A moles A

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  Introduction, Beer, S law

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