Figure 1
Various known concentrations of the stock solution of the complex ion were colormetrically
analyzed and a Beer’s law plot drawn (see Figure 2). The ASA that was produced was then
treated as described earlier and then colorimetrically analyzed with the concentration deter-
mined through extrapolation of the Beer’s law plot.
Finally, a small sample of the ASA was determined to have a final melting point of 134°C.
Figure 2
Absorbance
Molarity (M × 10 −^4 )
Beer's Plot-Salicylate Complex
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.5 1.5 2.5 3.5 4.5
400
0.80
0.70
0.60
0.50
0.40
absorbance
wavelength, nm
0.30
0.20
0.10
500 600 700
316
Part III: AP Chemistry Laboratory Experiments