Experiment 10

November 9, 2014
Madison Phillips
Report Submitted: November 9, 2014
Title: Beers Law and Calorimetry
Purpose: The purpose of this experiment is to apply Beer’s Law by analyzing samples provided by Q laboratory to determine their absorbance and prepare a Beer’s law plot. Molarity of these samples was also calculated to determine concentration and percent error rate. Students also analyzed the concentration of blue dye #1 to determine the concentration of blue dye #1 in a commercial blue dye drink.
Procedure: To drop solutions into the test tubes and then determine the Beer’s Law relationship of each and the calculations of each of part of the experiment.
Convert %T to absorbance and prepare a Beer’s Law plot using this data.
1. Concentration of Various Samples
Sample Identification Code Concentration of M (mol/L) %T A = 2 - log(%T)

Q5000 4.00 x 10-4 17.9 0.75
Q5001 3.20 x 10-4 25.0 0.61
Q5002 2.40 x 10-4 35.7 0.45
Q5003 1.60 x 10-4 50.2 0.3
Q5004 8.000 x 10-5 70.8 0.15

2. What is the concentration of M in these samples?

Concentration of M
Sample Identification Code %T A = 2 - log(%T) A M
Q021015-01 43.7 0.35951856 0.36 0.000192
Q021015-02 44.1 0.35556141 0.36 0.000.18
Q021015-03 43.8 0.35852589 0.36 0.00017
Q021015-04 44.1 0.35556141 0.36 0.00018
Q021015-05 43.8 0.35852589 0.36 0.00017

What was their percent error?
99.18

Does Batch 021015 meet legal requirements?
No, because it is not between 2.85 * 10(4) and 3.15 * 10(4)

Data Table 1:
Concentrations of Blue Dye
Well # 1 2 3 4 5 6 7 8 9 10
Drops of Blue Dye Solution 1 2 3 4 5 6 7 8 9 10
Drops of Distilled Water 9 8 7 6 5 4 3 2 1 0
Calculated Concentration 10 12 15 9 7 11 10 18 8 9

Data Table 2: Dilution
Test tube Number Solutions Concentration(M) Concentration(ppm)

3 Starting dilution (100 mL water and drops of blue#1 dye)
2 1:1 Dilution (1 part water - 1 part starting dye solution) 1 2:1 Dilution (2 parts water