Learning guidelines The following data were obtained for 1.00 cm samples of a particular chemical. What is the concentration of a 1.00 cmsample with an absorbance of 0.60 according to the graph?absorbance0.80.7y=1.4x-0.01..0.60.50.40.30.20.10.10.20.30.40.50.6ConcentrationRound to 2 decimal places, do not include units.Answer:Absorbance

In the given graph, x-axis represents concentration of the sample. y-axis represents absorbance of…

Answered: The following data were obtained for…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter25: Instruments For Optical Spectrometry

Section: Chapter Questions

Problem 25.6QAP

See similar textbooks

Similar questions

The following data were obtained for 1.00 cm samples of a particular chemical. What is the concentration of a 1.00 cm sample with an absorbance of 0.60 according to the graph below? Round to 2 decimal places do not include units!
A student prepared four standard solutions of (NH4)2Fe(SO4)2 and measured their absorbance at 505 nm. She created a calibration plot with the best-fit line of y = 9372 x + 0.0539. She measured the absorbance of her diluted unknown sample solution as (4.69x10^-1) nm. If she prepared her diluted sample solution by diluting 10.00 mL of the original solution to a total volume of 50.00 mL with deionized water, what is the concentration of Fe2+ in her original solution? Answer in units of M. Note: Your answer is assumed to be reduced to the highest power possible.
A student generates a calibration curve of absorbance versus concentration of Red Dye #40. The equation of the line (with an R-squared of 0.9976) is y = 36385x + 3.724x10 -5. If they found the absorbance of their unknown dye solution to be 0.6585 AU; what is the concentration?
A student prepared several solutions of Molecule Bright, each at a different concentration. The absorbance of each solution was measured at 405 nm with a path length of 0.730 cm. The student then plotted the absorbance of each sample vs. its concentration (in mM), and found a best-fit line of y = 3.726x + 0.828. Calculate the molar absorptivity of the Molecule Bright (in M-1 cm-1).
A student prepared several solutions of an unknown molecule, each at a different concentration. The absorbance of each solution was measured at 630 nm with a path length of 0.760 cm. The student then plotted the absorbance of each sample vs. its concentration (in uM), and found a best-fit line of y = 0.00626x + 0.00732. Calculate the molar absorptivity of the unknown molecule (in M-1 cm-1).
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.
The validation process comprises four main steps that are : hardware validation, software validation, method validation and system suitability. To evaluate a spectrophotometer’s accuracy by measuring absorbance, a solution of 60.06 mg/L K2Cr2O7 in 0.0050M H2SO4 was carefully prepared together with a 0.0050 M H2SO4 as a reagent blank. If the spectrometer’s signal is properly calibrated, it has been reported that this solution should provide an absorbance of 0.640 +- 0.010 at wavelength 350 nm. Which one of the validations mentioned above had been involved in this process? Explain your choice
A commercial drink mix is prepared at a concentration of 0.1 M and placed in a spectrophotometer and is measured to have an absorbance of 0.36. Finding the drink too watery, more drink mix is added, increasing the concentration to 0.15 M. What is the absorbance of the new solution?
2. ] You make 150.0 mL of a copper(II) sulfate solution but forget to cover it before leaving for the day. The next class, you measure the volume and find that you only have 132.0 mL remaining. You didn’t record the initial concentration, but you measure the absorbance of the remaining solution at 620 nm and find that it is 0.386. You also construct the following calibration curve for CuSO4: Standard solution Abs620 0.50 M 0.424 0.40 M 0.336 0.30 M 0.247 0.20 M 0.159 (refer to image) a. What is the value for k (in Beer’s Law)? Provide a calculation or graph to support your answer. b. What is the concentration of the (remaining) solution? c. What was the concentration of the original solution from the first class? d. If you removed 7.5 mL from the 132.0 mL solution in the process of measuring the absorbance, how much water should you add to obtain the original concentration that you solved for in part (c)?
A solution prepared by dissolving 25.8 mg of benzene (78.11 g/mol) in hexane (86.16 g/mol) and diluting to 250 mL had an absorption peak at 256 nm and an absorbance of 0.266 in a 1.000-cm cell. If a sample of hexane with benzene had an absorbance of 0.153 at 256 nm in a cuvette with 1.000-cm path length, find the concentration of benzene in molarity. A. 1.51×10-4 M B. 7.59×10-4 M C. 5.41×10-4 M D. 6.69×10-4 M
A solution with a known concentration equal to 3.4 mM gave an absorbance reading of 0.820 in a spectrophotometer. Assuming that there is a linear relationship between concentration and absorbance up to a concentration of 4.0 mM, what would the absorbance reading be for a solution with a concentration 2.2 mM?
A solution of a chemical compound absorbs at 350 nm. What is the concentration of this chemical compound? Transmittance of the solution: 0.63 Transmittance of the blank: 0.91 Pathlength: 1.0 cm e at 350 nm 18,400 M-1cm-1

SEE MORE QUESTIONS

Recommended textbooks for you

Fundamentals Of Analytical Chemistry

Chemistry

ISBN:

9781285640686

Author:

Skoog

Publisher:

Cengage

Macroscale and Microscale Organic Experiments

Chemistry

ISBN:

9781305577190

Author:

Kenneth L. Williamson, Katherine M. Masters

Publisher:

Brooks Cole

Chemistry & Chemical Reactivity

Chemistry

ISBN:

9781337399074

Author:

John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:

Cengage Learning

Fundamentals Of Analytical Chemistry

Chemistry

ISBN:

9781285640686

Author:

Skoog

Publisher:

Cengage

Macroscale and Microscale Organic Experiments

Chemistry

ISBN:

9781305577190

Author:

Kenneth L. Williamson, Katherine M. Masters

Publisher:

Brooks Cole

Chemistry & Chemical Reactivity

Chemistry

ISBN:

9781337399074

Author:

John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:

Cengage Learning

Chemistry & Chemical Reactivity

Chemistry

ISBN:

9781133949640

Author:

John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:

Cengage Learning

Living by Chemistry

Chemistry

ISBN:

9781464142314

Author:

Angelica M. Stacy

Publisher:

W. H. Freeman

Principles of Instrumental Analysis

Chemistry

ISBN:

9781305577213

Author:

Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS