Ocean County College
Department of Chemistry
Beer’s Law & Colorimetry
Date Submitted: 3/7/2015
Date Performed: 3/5/2015
Lab Section: Chem-180
Course Instructor: Cynthia Spencer
The purpose of this experiment was to construct a Beer’s Law Plot, determine the concentration of a sample using the Beer’s law plot, and to determine the concentration of Blue Dye #1 in a commercial product using visual Colorimetry.
This lab consisted of calculating %T of given data and constructing a Beer’s Law plow. Secondly, The Beer’s Law data was used to extrapolate the concentration of sample data for a drug. Lastly, a color standard was prepared with a known concentration to use in visual colorimetry to approximate the concentration of Blue Dye #1 in a commercial product. (P. 119-132 Jeschofnig ,n.d.).
Observations and Results
Beer’s law plot and best fit line for the data in Table 1.(given below) Sample Identification Code
Sample Concentration (M)
4.00 x 10-4
3.20 x 10-4
2.40 x 10-4
1.60 x 10-4
8.00 x 10-5
2 & 3)
Using the Beer’s law plot (above) and best fit line, the concentrations for samples: Q021015-01, Q021015-02, Q021015-03, Q021015-04 and Q021015-05 are determined. Sample Identification Code
Equation : A = -163750c + 79.22
Concentration of M in batch Q021015 = average of above 5 values = 4)
The company reported that sample Q021015 has an M concentration of 3.00 x 10^-4 M. Assuming that yours analysis is more accurate so what is their percentage error.
References: List all your references. Be sure to use the APA format.
1. P. Jeschofnig (n.d.). Beer’s Law and Colorimetry. General College Chemistry (n.d) p.#. 119-132 Hand-On Labs, Inc., Englewood, CO.
Please join StudyMode to read the full document