1. You received the following absorbance sketch from your lab partner, and he/she asks you for help in identifying the absorbance maximum. What is the estimated Amax in the spectrum for Standard No. 5 Blue #1 solution (see Figure 1)? 2.00- 1.95 1.50- 1.25 1.00t 75 .50 .25 O300 10 400 450 500 550 600 650 700 Wavekngth Cnm) Figure 1: Absorbance vs. Wavelength of Blue #1 2. What color is associated with this Amax? Explain why this color association makes sense for this dye solution. Assume your lab partner described that the solution looked hlue Absorbome o CAu)

1. You received the following absorbance sketch from your lab partner, and he/she asks you for help in identifying the absorbance maximum. What is the estimated Amax in the spectrum for Standard No. 5 Blue #1 solution (see Figure 1)? 2.00- 1.95 1.50- 1.25 1.00t 75 .50 .25 O300 10 400 450 500 550 600 650 700 Wavekngth Cnm) Figure 1: Absorbance vs. Wavelength of Blue #1 2. What color is associated with this Amax? Explain why this color association makes sense for this dye solution. Assume your lab partner described that the solution looked hlue Absorbome o CAu)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

5. A 2.50x10-5 M solution of a specific dye has an absorbance value of 1.300 when measured at 525 nm in a cell with a path length of 2.00 cm. Calculate the molar absorptivity of this dye at this wavelength.
A specific steroid has a λmax of 249 nm and a molar absorptivity ε of 11,500 L mol−1 cm–1. What is the concentration of the compound in a solution whose absorbance at 249 nm is A = 0.050 with a sample pathlength of 1.00 cm?
Solve the problems using a step-by-step process (solutions). 1. A 1.0x10-3 M solution of a dye X shows an absorbance of 0.20 at 450 nm wavelength and an absorbance of 0.05 at 620 nm wavelength. Calculate the extinction coefficient for each wavelength. (Ans. e450 = 200 ; e620 = 50)
What is the color of a KMnO4 solution? Which solution, 0.50M or 0.25M, will be darker in tone? 2. What is the corresponding absorption to a transmission level of 63%? 3. If a solution has 0% transmission, what does that tell about the solution and the amount of light it absorbs? 4. What is the molarity of a solution containing 40g of ZnCl2 dissolved in 1000mL of solution?
A student mixed 5.00 mL of 0.100 M Fe(NO3)3 with 50.00 mL of 2.00x10−4 M KSCN. The student measured the absorbance of one aliquot of the solution at a wavelength of 447 nm, with a pathlength of 1.00 cm. The absorbance reading was 0.615. Compute the following quantities a. [FeSCN2+]eq = b. (mols FeSCN2+)eq = c. (mols Fe3+)initial = d. (mols SCN−)initial = e. (mols Fe3+)eq = f. (mols SCN−)eq = g. [Fe3+]eq = h. [SCN−]eq = i. Keq=
Absorbance measurements in the range of A = 0.3 - 2 are considered the most accurate. Why are absorbance measurements of 0.05 and 2.5 considered inaccurate? If the absorbance is too high (A = 2.5), the signal difference between the sample and the reference is too small for an accurate measurement. At A = 2.5, the transmission is too high for an accurate measurement. The difference in the absorbance of the sample and reference is too small at A = 0.05. At A = 2.5, the detector is saturated because too much light is reaching the detector. At A = 2.5, a sufficient amount of light does not reach the detector for an accurate measurement.
How do I solve for [FeSCN2+] heres the formula they provided me and my data but I would like steps on how to solve it and what data I should be using to solve for it u can use any fake numbers you need to help me understand ! I'm confused only by the absorbance part , what number am I using for the absorbance? Is it Fe3+ added to ScN- absorbance values ? also e = 202 and L = 1.0
A 2.42 x 10-5 M sample of compound X in a solvent has an absorbance of 0.313 at 528 nm in a 1.000 cm cuvel alone has an absorbance of 0.058. What is the molar absorptivity of compound X? 5 € = M-¹.cm=¹ A different sample of compound X in the same solvent has an absorbance of 0.485 at 528 nm when measured with the same cuvette. What is the concentration of this second sample? [X] = mol X L
A standard curve of absorbance vs. concentration has a linear trendline of y = 0.56x + 0.987. Use this trendline to calculate the concentration of an unknown sample that has an absorbance of 1.245.
4 of 15 Abs 2.0 1.5 1.0 0.5 0.25 0. 0.2 0.4 0.6 Concentration (M) With reference to the UV-Vis calibration curve reported above, calculate the concentration (Molar) of a sample whose Absorbance is 1.0. Report your answer with two significant figures.
Amplitude ° Use the supplied NMR spectrum to gain insight into methyl silicylate. Decipher the spectrum by assigning hydrogen peaks in the molecule and include it with your report. 15- 10- 5- x103 12 ہیں OH Spectrum Scan [1/1] Oil of Wintergreen START END VALUE 11.21 10.47 0.98 8.30 6.41 4.00 5.55 5.04 0.40 4.47 3.45 3.00 мили ៖ 10 8 6 ppm 2
Given the following sample concentrations and corresponding absorbances, construct a standard curve of absorbance vs. concentration and determine the molar absorptivity constant. Sample Concentration 15 μΜ 25 μΜ 40 μΜ Absorbance 0.19 0.32 0.49 55 μΜ 0.70