Question: 1. Determine the lambda max used to read the solutions. How was this obtained? 2. Determine the molar absorptivity coefficient of the metal complex at lambda max using the 5 standard solutions. (Suppose that path length = 1 cm)

Question: 1. Determine the lambda max used to read the solutions. How was this obtained? 2. Determine the molar absorptivity coefficient of the metal complex at lambda max using the 5 standard solutions. (Suppose that path length = 1 cm)

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter24: Introduction To Spectrochemical Methods

Section: Chapter Questions

Problem 24.16QAP

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Concept explainers

Coordination Chemistry

It is a part of chemistry, in which the study of compounds that have central atoms surrounded by molecules or ions, known as ligand, is known as coordination chemistry.

Question

A metal complex, [Y(NH₃)₆]ⁿ⁺, gives a purple color. Suppose that Y is an unknown metal. A 0.0000258 M standard solution was scanned using UV-vis spectrometer, and the data collected is in Image 1.

Four more standard solutions were also scanned at a lambda max which is related to the puple color. The data for this is in Image 2.

Question:

1. Determine the lambda max used to read the solutions. How was this obtained?

2. Determine the molar absorptivity coefficient of the metal complex at lambda max using the 5 standard solutions. (Suppose that path length = 1 cm)

Concentration (x 10-5 M)
Absorbance
1.59
0.220
2.17
0.309
3.73
0.605
4.27
0.690

0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
100
200
300
400
500
600
700
800
-0.1 0
Wavelength (nm)
Absorbance

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