Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 13, Problem 13.6QAP
Interpretation Introduction
Interpretation:
The molar absorptivity of a solution containing
Concept introduction:
The molar absorptivity of a solution is defined as the capacity of a solution to absorb the particular
Now, the relation between the molar absorptivity, absorbance and concentration of the solution is given by the relation.
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Chapter 13 Solutions
Principles of Instrumental Analysis
Ch. 13 - Prob. 13.1QAPCh. 13 - Prob. 13.2QAPCh. 13 - Prob. 13.3QAPCh. 13 - Prob. 13.4QAPCh. 13 - Prob. 13.5QAPCh. 13 - Prob. 13.6QAPCh. 13 - Prob. 13.7QAPCh. 13 - At 580 nm, which is the wavelength of its maximum...Ch. 13 - Prob. 13.9QAPCh. 13 - Zinc(II) and the ligand L form a 1:1 complex that...
Ch. 13 - The equilibrium constant for the conjugate...Ch. 13 - The equilibrium constant for the reaction...Ch. 13 - Prob. 13.13QAPCh. 13 - Prob. 13.14QAPCh. 13 - Prob. 13.15QAPCh. 13 - Prob. 13.16QAPCh. 13 - Prob. 13.17QAPCh. 13 - Prob. 13.18QAPCh. 13 - Prob. 13.19QAPCh. 13 - Prob. 13.20QAPCh. 13 - Prob. 13.21QAPCh. 13 - Prob. 13.22QAPCh. 13 - Prob. 13.23QAPCh. 13 - Prob. 13.24QAPCh. 13 - Prob. 13.25QAPCh. 13 - Prob. 13.26QAPCh. 13 - Prob. 13.27QAP
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- 6 A solution containing 4.48 ppm KMnO4 exhibits 85.9% transmittance in a 1.00 cm cell at 520 nm. Calculate the molar absorptivity of KMnO4 at this wavelength.arrow_forward5. A 7.25x104 M solution of Potassium cyanide (KCN) has a transmittance of 45.2% when measured in a 2 cm cell at a wavelength of 525 nm. Calculate (a) the absorbance of this solution; (b) the molar absorptivity of KMNO4.arrow_forwardA 0.0045 M solution was analyzed using the Spectronic 20 instrument and has 37.0% transmittance at 470 nm in a 1.00 cm cell. a) Calculate the absorbance of the solution. b) Using Beer's law, calculate the concentration of the solution if it gives 85.2% transmittance under the same conditionsarrow_forward
- A 0.035 g of KMnO4 was dissolved in 200 mL of distilled water. This solutionhad a transmittance of 40.5% when measured in a 1.05 cm cell at a wavelengthof 525 nm. Calculate the molar absorptivity of KMnO4. (MM = 158.034 g/mol)arrow_forwardA 50.0 mg sample was dissolved in acid and then diluted to a total volume of 50.00 mL. If 1.000 mL ofthis solution was then diluted to 50.00 mL with water. If this diluted solution had a transmittance of 0.275 at520 nm, what is the concentration of KMnO4 in ppm in this diluted solution, assuming no interference fromother species at this wavelength?arrow_forwardThe transmittance of a solution measured at 590 nm in a 1.5-cm cuvette was 76.2%. (a) What is the corresponding absorbance?(b) If the concentration is 0.0802 M, what is the absorptivity of this species at this wavelength? (c) If the absorptivity is 10,000 L mol-1 cm-1, what is the concentration?arrow_forward
- 3. A 2.50x10-4M solution of a dye has an absorbance of 0.680 when measured in a 1.00 cm cell at 625 nm. Calculate the %Transmittance of the solution. Will the %Transmittance increase or decrease if the concentration of the dye is increased.arrow_forwardFind the concentration of a solution with a transmittance of 0.27 AU and molar absorptivity of 3.65 x 104 M- cm in a 1.00 cm cell.arrow_forwardWhat absorbance value corresponds to 47.4% T? A = 0.323 A 0.0141 M solution of a certain analyte exhibits 47.4% T at a wavelength of 280 nm. What will the percent transmittance be for a 0.0279 M solution of the same analyte? Assume the pathlengths for each measurement are equal. %T = Incorrect %arrow_forward
- 1.4 A 6.25 x 10-³ M solution of potassium permanganate (KMnO4) has a transmittance of 47.4% when measured in a 1.5 cm cell at a wavelength of 625 nm. (a) Calculate the absorbance of the KMnO4 solution (b) Calculate the molar absorptivity of KMnO4arrow_forwardA solution of KMnO4 has an absorption of 0.560. Calculate the corresponding transmittance. 0.275 0.440 3.63 0.252arrow_forwardAt 520 nm with a 1.00 cm cell a 8.24 ppm solution of KMnO4 has a transmittance of 0.126. What is the molar absorptivity of KMnO4 at 520 nm?arrow_forward
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