Iron(III) Nitrate and Potassium Thiocyanate

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Iron(III) Nitrate and Potassium Thiocyanate

Category: Speech or PowerPoint Presentation

Subcategory: Biochemistry

Level: University

Pages: 1

Words: 275

Iron (111) Nitrate and Potassium Thiocyanate
Author’s Name:
Partner’s Name: Date of Experiment
The purpose of the experiment was to verify Beer’s law which states that Absorbance is
directly proportional to Concentration of a given solution. To verify this,Fe3+ were made to react
with SCN- where they formed a dark red colored solution whose absorbance was determined in a
spectrophotometer. The complex formed absorbs a blue light at an absorbance of 459.4 which
was the highest before the solutions were diluted. The solutions containing the same ions were
made to react but their concentrations were lowered and at the same time, the Fe3+were made to
be the limiting agent.The equilibrium was still attained despite the change in concentration.This
is according to the law of equilibrium. The absorbance of each of the solutions was then
determined by setting the photo-spectrometer at 459.4 i.e. the highest wavelength attained by the
initial solution. It was observed that as the concentration decreased, the absorbance also
decreased as equilibrium is attained which now verified the Beer Lambert’s law.
Absorbance; a light diffusion
Spectrophotometer; measuring instrument.
Equilibrium; Reac…

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