Determination of an Equilibrium Constant

Objective: Fe (SCN) 2+ (aqueous solution) of Fe 3 + (aqueous solution) + SCN - (aqueous solution) -----> Background: In order to determine the equilibrium constant of the following reaction, The equilibrium constant K of the reaction is expressed by the following. Given: K = [FeSCN 2 +] [Fe 3 +] [SCN 1 -], the concentration of the substance is in equilibrium. It is used to determine the equilibrium concentration of these substances and to determine K

Determination of the equilibrium constant for FeSCN 2+ formation The purpose of this experiment was to determine equilibrium concentrations and then to determine Kc. Dilution calculations are performed to determine the concentrations of SCN - and Fe (SCN) 2 +. Each cuvette can be filled to the same volume and seen in the table, then absorbance can be recorded from each cuvette and can be seen in Table 1. Beer's law diagram is created based on the data recorded from absorbance. During the second part of the experiment, Fe (NO 3) 3 was added and diluted with HNO 3. In the second part of the experiment, all cuvettes were mixed with the same solution. This can be seen in Table A. Dilution calculations were performed to determine the initial concentrations of Fe 3+ and SCN -. Equilibrium concentrations were then determined using the formula Abs + b / slope, which resulted in each Kc calculated for each test. Chemical reaction

An example of a spectrophotometric experiment is to determine the solution equilibrium constant. Certain chemical reactions in solution may occur in the reverse and forward directions where the product decomposes into reactants and the reactants form products. At some point, this chemical reaction reaches an equilibrium point called the equilibrium point. At this point the permeability of the solution can be tested spectrophotometrically to determine the respective concentrations of product and reactant.

The equilibrium constant (K) defines the relationship with the concentration of the substance involved in the chemical equilibrium reaction. If stress such as temperature, pressure, or change in concentration in equilibrium reaction stress, the reaction will be transformed to restore balance Principle of Le Chatelier. Because of fever and endothermic reaction, such an increase in stress is a change in temperature. The equilibrium constant at a particular temperature is determined using the ratio of the equilibrium concentrations of the reaction products and is done to indicate the degree of reaction

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