slope (m): 0.02534 1/(µM) y-intercept (b): -0.0009147 Q5. If Ana determines the absorbance of an unknown tartrazine sample to be 0.662, what is the concentration of the sample in µM?
slope (m): 0.02534 1/(µM) y-intercept (b): -0.0009147 Q5. If Ana determines the absorbance of an unknown tartrazine sample to be 0.662, what is the concentration of the sample in µM?
Chapter7: Solutions And Colloids
Section: Chapter Questions
Problem 7.37E
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Question
For the following questions (Q1-Q5), consider the compound tartrazine (Yellow 5 food dye) that has a chemical formula of C16H9N4Na3O9S2. Ana weighs out 0.1328 g of tartrazine powder on the balance for her experiment and makes a stock solution by dissolving her powder in 500.0 mL of solution.
Concentration (µM or µmol/L) |
Absorbance |
0.00 |
0.001 |
9.94 |
0.252 |
19.9 |
0.506 |
29.8 |
0.738 |
39.8 |
1.018 |
slope (m): 0.02534 1/(µM)
y-intercept (b): -0.0009147
Q5. If Ana determines the absorbance of an unknown tartrazine sample to be 0.662, what is the concentration of the sample in µM?
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