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-

$\ln \frac{P_o}{P}={\mu }_M\rho x$

Where,

P_o= transmitted beam power

P = incident beam power

µ_M = mass absorption coefficient

ρ = density

x = sample thickness

${\mu }_M=W\times \mu$

Where,

${\mu }_M$ = mass absorption coefficient of the sample

${\mu }_{ I_2}$ = 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-

$\ln \frac{P_o}{P}={\mu }_M\rho x$

${\mu }_M=W\times \mu$