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 14, Problem 14.22QAP
Mixing the chelating reagent B with Ni(II) forms the highly colored NiB22+, whose solutions obey Beer’s lawat 395 nm overa wide range. Provided the analytical concentration of the chelating reagent exceeds that of Ni(II) by a factor of 5 (or more), the cation exists, within the limits of observation, entirely in the form of the complex. Use the accompanying data to evaluate the formation constant Kf for the process
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Give the chemical equations that are characterised by the stepwise
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copper complexes with ethylenediamine.
Which of the following statements is(are) correct?
(1) Kr is a measure of the interaction strength of a ligand relative to the interaction strength of the solvent
molecules as a ligand.
(ii) The general trend in successive formation constants is K1 < Kz < K3 < ... < Kn.
(iii) The dissociation constant is inverse of the formation constant.
a. (i) and (iii)
a
b
b. (ii)
c. (ii) and (iii)
(b) A. for the octahedral complex [Mn(OH2)6]3+ was measured to be 21000 cm-1.
(i)
Explain how Aois normally measured for transition metal complexes.
[2 MARKS]
(ii)
P, the pairing energy, for the Mn3+ ion was found to be 28000 cm1. Predict an
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each step in your reasoning and showing all your workings.
[4 MARKS]
(iii) Predict approximate magnetic moments for the complexes [MnCl6]³- and
[Mn(CN)6] given that f factors for Cl- and CN are 0.78 and 1.70 respectively.
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(iv) Explain in terms of molecular orbitals why the f factor for Cl is much less than
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[4 MARKS]
Chapter 14 Solutions
Principles of Instrumental Analysis
Ch. 14 - Prob. 14.1QAPCh. 14 - A 0.4740-g pesticide sample was decomposed by wet...Ch. 14 - Sketch a photometric titration curve for the...Ch. 14 - Prob. 14.4QAPCh. 14 - Prob. 14.5QAPCh. 14 - The accompanying data (1.00-cm cells) were...Ch. 14 - A 3.03-g petroleum specimen was decomposed by wet...Ch. 14 - Prob. 14.8QAPCh. 14 - Prob. 14.9QAPCh. 14 - The acid-base indicator HIn undergoes the...
Ch. 14 - Prob. 14.11QAPCh. 14 - Prob. 14.12QAPCh. 14 - Copper(II) forms a 1:1 complex with the organic...Ch. 14 - Aluminum forms a 1:1 complex with...Ch. 14 - Prob. 14.15QAPCh. 14 - Prob. 14.16QAPCh. 14 - Prob. 14.17QAPCh. 14 - Prob. 14.18QAPCh. 14 - Prob. 14.19QAPCh. 14 - Given the Information that...Ch. 14 - Prob. 14.21QAPCh. 14 - Mixing the chelating reagent B with Ni(II) forms...Ch. 14 - Prob. 14.23QAP
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