(a) Interpretation: The percent transmittance of the solution of the zinc and the ligand L having an absorbance of 0.352 is to be calculated. Concept introduction: The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution. The relation between the absorbance and transmittance is established by the Beer’s law. A = − log T

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Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213
BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

Solutions

Chapter 13, Problem 13.10QAP
Interpretation Introduction

(a)

Interpretation:

The percent transmittance of the solution of the zinc and the ligand L having an absorbance of 0.352 is to be calculated.

Concept introduction:

The percent transmittance of a solution is the ability of the solution to allow the monochromatic light to pass through it. The percent transmittance of a solution is the ratio of the intensity of monochromatic light incident on the solution to the intensity transmitted through the solution.

The relation between the absorbance and transmittance is established by the Beer’s law.

A=logT

Interpretation Introduction

(b)

Interpretation:

The percent trasnmittance of the solution is to be calculated when it is placed in a cell having a path length of 2.50cm.

Concept introduction:

The path length affects the absorbance of the solution as it is directly proportional to the absorbance of the solution. The absorbance actually depends on the concentration, molar absorptivity and the path length of the cell.

First the absorbance of the solution is determined by the Beer’s law as.

A=logT

Now, this value of absorbance is compared for the different values of the path length of the cell by using the relation between the absorbance of the solution with the molar absorptivity, concentration and the path length of the cell as.

A=εbc

Interpretation Introduction

(c)

Interpretation:

The molar absorptivity of the complex solution formed is to be calculated.

Concept introduction:

The molar absorptivity of a solution is defined as the capacity of a solution to absorb the particular wavelength of light incident on it.

In order to calculate the molar absorptivity, the relation between the molar absorptivity, absorbance and concentration of the solution is used as.

A=εbc

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