Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
bartleby

Concept explainers

Question
Book Icon
Chapter 12, Problem 12.8QAP
Interpretation Introduction

(a)

Interpretation:

The density of solution I2 is 0.794gm/cm3 which is present in ethanol. Transmission of 33.2% of the radiation from a Mo Ka is done by using a layer of 1.50 cm. Mass absorption coefficient are 39.2,0.70, 0.00, 1.50 for I, C, H and O respectively. Percentage of I2 present in ethanol is to be determined, neglecting the absorption by alcohol.

Concept introduction:

Formula used for the calculation are-

lnPoP=μMρx

Where,

Po= transmitted beam power

P = incident beam power

µM = mass absorption coefficient

ρ = density

x = sample thickness

μM=W×μ

Where,

μM = mass absorption coefficient of the sample

μ I2 = mass absorption coefficient of I2 W= weight fraction of iodine

Interpretation Introduction

(b)

Interpretation:

Percentage of I2 present in ethanol is to be determined when alcohol is present.

Concept introduction:

Formula used for the calculation are-

lnPoP=μMρx

μM=W×μ

Blurred answer
Students have asked these similar questions
You have two solutions of the same compound that are blue. one is very pale and the other is very intense. Absorbance of each solution was measured with a spectrophotometer at the same wave length at which the solution absorbs. (A) Which solution has the higher absorbance? (B) Which is the more concentrated solution?
You have extracted a new compound with a molar mass of 270 g/mol. A 10 mg/L of this substance in a 1-cm cuvette can transmit 60% of the original incident radiation intensity. Calculate (a) the absorbance and (b) the molar absorptivity of the new compound.
(5) A sample of sodium phosphate is dissolved in water to give 100.00 mL of solution (Solution A). Then this solution is diluted 5 times to give the final solution (Solution B). Solution B is Known to contain 3.920 x 1022 number of PO43- ions, which has an absorption peak at 460 nm and absorbance value of 0.355 in a 1.000 cm cuvette. (i) Calculate the molar absorptivity of Solution B. (ii) What mass of sodium phosphate (MM 163.94 g/mol) dissolved in Solution A.
Knowledge Booster
Background pattern image
Chemistry
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Macroscale and Microscale Organic Experiments
Chemistry
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Brooks Cole
Text book image
Principles of Modern Chemistry
Chemistry
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:Cengage Learning