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1 The chelate CuA,2- exhibits maximum absorption at 480 nm. When the chelatingreagent is

Principles of Instrumental Analysis | 6th Edition | ISBN: 9780495012016 | Authors: Douglas A. Skoog F. James Holler Stanley R. Crouch ISBN: 9780495012016 317

Solution for problem 14-21 Chapter 14

Principles of Instrumental Analysis | 6th Edition

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Principles of Instrumental Analysis | 6th Edition | ISBN: 9780495012016 | Authors: Douglas A. Skoog F. James Holler Stanley R. Crouch

Principles of Instrumental Analysis | 6th Edition

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Problem 14-21

1 The chelate CuA,2- exhibits maximum absorption at 480 nm. When the chelatingreagent is present in at least a tenfold excess, the absorbance depends onlyon the analytical concentration of Cu(I1) and conforms to Beer's law over a widerange. A solution in which the analytical concentration of Cu IT is 2.15 X 10-4 Mand that for A 2- is 9.00 X 103 M has an absorbance of 0.759 when measuredin a 1.00-cm cell at 480 nm. A solution in which the analytical concentrationsof Cu" and A ,- are 2.15 X 10-4 M and 4.00 X 10-4 M, respectively, has anabsorbance of 0.654 when measured under the same conditions. Use thi~ i'oformationto calculate the forma lion constant K, for the process .CulT + 2A2- ~ CuA2'-

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Chapter 3: Atomic Structure Keyterms ● Electrolysis: chemical reactions caused by electricity ● Electrolyte: Compound that conducts electricity when melted or dissolved in water ● Electrodes: Carbon rods or metal strips inserted into a molten compound or a solution to carry the electric current ● Anode: The electrode that bears...

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Chapter 14, Problem 14-21 is Solved
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Textbook: Principles of Instrumental Analysis
Edition: 6
Author: Douglas A. Skoog F. James Holler Stanley R. Crouch
ISBN: 9780495012016

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