1. A Wavelength:470nm Mass of unopened packet 1 5.255g Mass of emptied packet 1
ID: 1064834 • Letter: 1
Question
1. A Wavelength:470nm
Mass of unopened packet 1 5.255g
Mass of emptied packet 1 1.358g
Mass of mix1 transferred 3.897g
Volume of stock solution 1 1.00L
Stock solution 1 concentration 3.90g/L
Stock solution 1 absorbance 2.315
2. B Wavelength:470nm
Mass of unopened packet 2 5.250g
Mass of emptied packet 2 1.170g
Mass of mix2 transferred 4.086g
Volume of stock solution 2 1.00L
Stock solution 2 concentration 4.086g/L
Stock solution 2 absorbance 2.688
Kool-Aid Flavor 1
Dilution (mL/100mL)
5.00mL
10.0mL
15.0mL
20.0mL
25.0mL
Concentration (mg mix/L)
195 mg/L
390 mg/L
585 mg/L
780 mg/L
975 mg/L
Absorbance 1
0.205
0.357
0.560
0.745
0.932
Kool-Aid Flavor 2
Dilution (mL/100mL)
10mL
15mL
20 mL
25 mL
30 mL
Concentration (mg mix/L)
408.6 mg/L
612.9 mg/L
817.2 mg/L
1021.5 mg/L
1225.8 mg/L
Absorbance 2
0.252
0.394
0.520
0.663
0.843
Question
1.Can you tell if Beer`s Law holds for your stock solutions as well as in the calibration range? Why or why not?
2.. How did your calculated mix mass compare to the amount stated on the packet label?
Kool-Aid Flavor 1
Dilution (mL/100mL)
5.00mL
10.0mL
15.0mL
20.0mL
25.0mL
Concentration (mg mix/L)
195 mg/L
390 mg/L
585 mg/L
780 mg/L
975 mg/L
Absorbance 1
0.205
0.357
0.560
0.745
0.932
Kool-Aid Flavor 2
Dilution (mL/100mL)
10mL
15mL
20 mL
25 mL
30 mL
Concentration (mg mix/L)
408.6 mg/L
612.9 mg/L
817.2 mg/L
1021.5 mg/L
1225.8 mg/L
Absorbance 2
0.252
0.394
0.520
0.663
0.843
Explanation / Answer
From the given data
1. The data shows that Beer's law holds true for the stock solution as wel as in the caibration range. As we increase the concentration of the stock in the soluton, more light would be asbsorbed and thus the absorbance goes up with the increase in concentration of the solution.
2. The mix mass is calculated by taking the difference bwteen the unopened mix packet mass and the mass of empty packet.
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