Science

ChemistryPrinciples of Instrumental Analysis(a) Interpretation: Mass absorption coefficient of a solution containing 11.00 g of KI and 89.00 g of water should be calculated. Concept introduction: Mass absorption coefficient ( μ M ) is the absorption cross section per unit mass (units are cm 2 /g) . Mass absorption coefficient is independent of chemical and physical nature of elements. Mass absorption coefficient ( μ M ) of a sample can be calculated by adding the contributions of the mass absorption coefficients of each element present in the sample. Contribution of “element A” to the mass absorption coefficient of a sample can be written as W A μ A Where, W A = weight fraction of the element A and μ A = mass absorption coefficient of the element Therefore, the mass absorption coefficient ( μ M ) of a sample can be written as, μ M = W A μ A + W B μ B + W C μ C + ... In order to calculate mass fractions of each element in a sample, the atomic mass of each element and the molar mass of each compound should be known. Weight fraction ( W A ) = atomic mass of the element molar mass of the compound × weight of the compound × 1 weight of the sample Atomic/molar masses of K =39 .10 g/mol I =126 .90 g/mol K =39 .10 g/mol H =1 .01 g/mol O =16 .0 g/mol KI =166 .0 g/mol H 2 O =18 .02 g/molStart your trial now! First week only $4.99!*arrow_forward*

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7th Edition

Douglas A. Skoog + 2 others

Publisher: Cengage Learning

ISBN: 9781305577213

Chapter 12, Problem 12.6QAP

Interpretation Introduction

**(a)**

**Interpretation:**

Mass absorption coefficient of a solution containing

**Concept introduction:**

Mass absorption coefficient (

Mass absorption coefficient (

Contribution of “element A” to the mass absorption coefficient of a sample can be written as

Where,

Therefore, the mass absorption coefficient (

In order to calculate mass fractions of each element in a sample, the atomic mass of each element and the molar mass of each compound should be known.

Interpretation Introduction

**(b)**

**Interpretation:**

Transmitted fraction of the radiation when the Mo

**Concept introduction:**

Beer’s law can be written as follows, in which, mass absorption coefficient (

Transmittance (T) of a medium is the fraction of incident radiation transmitted by the medium.

Therefore, transmittance can be rewritten as: