Here it is. I used the report you sent as a template. It should be good. I have already done the cover, I included it. I did not modify any data or calculations you made. Let me know if you need anything else.
General Engineering Chemistry I
(SPECTROMETRIC ANALYSIS OF COBALT (II) CHLORIDE)
Student Name: Omar Salman
The measurement of UV-Vis radiation absorption gives a reliable and easy method to analyze
several organic and inorganic compounds. Radiation in this region of the electromagnetic spectrum
has enough energy to induce electronic transitions of the valence electrons of several compounds.
In this quantitative technique a solution is irradiated with a beam, being able to measure how much
radiation was absorbed (absorbance) in a spectrometer. The absorbance is directly related to the
concentration of the analyte and therefore we can determine the concentration of unknown
solutions by using the Beer-Lambertβs Law.
log πΌ π = π΄ππ = π Γ π Γ π Beerβs Law
The Beerβs Law states that the absorbance is directly proportional to the concentration of the
solution and the thickness of the container. Since in the experiment the cell used will be the same
all along and the constant Ξ΅ does not change since itβs the same compound, the term π Γ π can de
considered a constant and the equation can be rewritten as:
π¨ππ = π² Γ π
Experimentally, a series of solutions with known concentration will be prepared and their
absorbances measured in a spectrometer (Spectronic 20), then the concentration vs. the absorbance
will be plotted in what is commonly referred to as a calibration curve. Calculating the slope of the
straight, if the Beerβs law applies, we can determine the constant K by comparing the equations:
π¨ππ = π² Γ π ππ πππ’ππ£πππππ‘ π‘π
π = ππ + π
π€βπππ π = π = π ππππ
15 Million Students Helped!
Sign up to view the full answer