13. A 9.50 μM standard solution of X yields an absorbanceof 0.657 at 630 nm using a 1.00-cm cuvette. Themolar absorptivity for X at 630 nm isa) 40,700 M-¹cm-1b) 614,000 M-¹cm-¹c) 1010 M-¹cm-1d) 69,200 M¹¹cm ¹e) 138,700 M¹¹cm¹14. The molar absorptivity for ferricyanide ion (FW =211.95 g/mol) at 420 nm is 1010 M-¹cm¹. What is theconcentration of ferricyanide in a solution that yieldsan absorbance of 0.354 in a 1.00-cm cuvette?a) 30 ppmb) 45 ppmc) 60 ppmd) 75 ppme) 90 ppm15. Deviations from Beer's law are observed whenmeasurements are madea) with highly concentrated solutionsb) using polychromatic light sourcesc) in the presence of stray lightd) all of thesee) none of these16. Photometric assays typically involve measuringabsorbance at an analyte's "Amax" in order toa) maximize sensitivityb) maximize selectivityc) maximize accuracyd) maximize precisione) maximize detection limit17. The calibration curves shown at the right indicate thephotometric measurements satisfy Beer's law at both550 nm and 635 nm. Which statement below is true?a) analysis at 550 nm yields a more sensitive analysisb) analysis at 635 nm yields a more sensitive analysisc) analysis at 550 nm yields a more selanalysisd) analysis at 635 nm yields a more selective analysise) these curves do NOT satisfy Beer's law18. A sample solution yielded an absorbance of 0.723 at550 nm when analyzed using the procedure thatproduced the calibration curves at the right. Theconcentration of analyte in the sample solution isa) 15 µg/mLb) 17 µg/mLc) 20 µg/mLd) 23 µg/mLe) 27 µg/mLAbsorbance1.210.80.60.40.2о1020550 nmy=0.0405x+0.0191R² = 0.9989Concentration (µg/mL)635 nmy= 0.0266x+0.0065R² = 0.9993040

Note: Since you have posted multiple questions, we will provide the solution only to the first…

13. A 9.50 μM standard solution of X yields an absorbance of 0.657 at 630 nm using a 1.00-cm cuvette. The molar absorptivity for X at 630 nm is a) 40,700 M-¹cm¹ b) 614,000 M-¹cm-1 c) 1010 M-¹cm¹ d) 69,200 M¹¹cm-¹ e) 138,700 M-¹cm¹

13. A 9.50 μM standard solution of X yields an absorbance of 0.657 at 630 nm using a 1.00-cm cuvette. The molar absorptivity for X at 630 nm is a) 40,700 M-¹cm¹ b) 614,000 M-¹cm-1 c) 1010 M-¹cm¹ d) 69,200 M¹¹cm-¹ e) 138,700 M-¹cm¹

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

1. List the concentrations of the stock. [Acetone] 0.6M [lodine] 00025M [HC1] 2. From the computer plot of the data for each trial (absorbance vs. time in seconds), detemine the slope of the best straight line; use the following data table to summarize your results: Table 1. Trial # Acetone, mL lodine, mL HCI, mL AAbs/At ( slope of line) H20, mL A 1.0 1.0 1.0 2.0 -0.0010258xto:34978. t0.0016339x+0.44357 70,00g0217x 0.89112 0. 0013205xto,235271 2.0 1.0 1.0 1.0 1.0 2.0 1.0 1.0 D 1.0 1.0 2.0 1.0 3. Convert stock concentrations to initial concentrations and fill in Table 2: Table 2. Trial # Disappearance Rate of l2 (M/s) -A[L/At (= -slope/730) [Acetone] [lodine] [HCIJ 0.12 0.00050.12 0.24 0.12 10.12 0. coe 5 0.12 0.001 0.12 D 0.00050.24
Following AAS analysis, a graph of absorbance versus ppm nickel standard gave a best-fit line y = 0.0428x + 0.0487 . Calculate the ppm nickel in the well water sample having an absorbance of 0.675. 0.13 15.91 0.08 14.60
Please give me correct solution.
If the absorbance for the solution was 0.342, calculate the equilibrium constant, Keq, with zero places after the decimal.
deriving equation from equation 2 and 3
Can you explain the IR spectrum ?
Create a separations flowchart for qualitative analysis for the following Sb3+ Fe3+ Zn2+ Al3+ Cd2+