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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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- What absorbance value corresponds to 49.1% T? A = A 0.0179 M solution of a certain analyte exhibits 49.1% T at a wavelength of 280 nm. What will the percent transmittance be for a 0.0265 M solution of the same analyte? Assume the pathlengths for each measurement are equal. %T = %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
- The 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_forward3. 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_forward
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- At 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_forwardThe following data have been obtained in the calibration of a series of standards for the determination of iron, measuring the transmittance, at 506 nm and thickness of 1.00 cm of iron (II) solutions in which color with 1.10 has been developed -phenanthroline. [Fe] (ppm) 0.20 0.40 0.60 0.80 1.00 2.00 3.00 4.00 5.00 6.00 7.00 T (%) 90.0 82.5 76.0 69.5 63.5 41.0 26.3 17.0 10.9 7.0 4.5 Calculate the mean molar absorptivity of iron when determined by this method.arrow_forwardA particular food coloring product has a molar absorptivity of 3.8 × 103 cm−1M−1 at λ max 510 nm. Calculate the absorbance and percentage of transmittance for a solution with a concentration of 2 × 10−4 M measured with a 1 cm cuvette at 510 nm.arrow_forward
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