Concept explainers
(a)
Interpretation:
The goniometer setting to observe the ka1 lines for Fe (1.76
Concept introduction:
Bragg’s diffraction condition will be used for the calculation of goniometer setting. This formula is given as-
Where,
n = integer
λ= wavelength
d = interplanar distance of crystal
θ= angle
Answer to Problem 12.9QAP
Value of Goniometer setting in terms of 2θ when crystal is topaz-
For Fe = 80.9°
For Se = 42.9°
For Ag = 20.9°
Explanation of Solution
Mathematical expression for the Bragg’s diffraction condition is given below -
Goniometer setting value in terms of 2θ when a diffracting crystal is a topaz-
Value of d for topaz = 1.356
The wavelength of ka1 lines for Fe = 1.76
n =1
Put this value in equation (1):
Wavelength of ka1 lines for Se = 0.992
n =1
Put this value in equation (1)
Wavelength of ka1 lines for Ag = 0.497
n =1
Put this value in equation (1)-
(b)
Interpretation:
The goniometer setting to observe the ka1 lines for Fe (1.76
Concept introduction:
Bragg’s diffraction condition will be used for the calculation of goniometer setting. This formula is given as-
Where,
n = integer
λ= wavelength
d = interplanar distance of crystal
θ= angle
Answer to Problem 12.9QAP
Value of goniometer setting in terms of 2θ when crystal is LiF-
For Fe = 51.8°
For Se = 28.4°
For Ag = 14.02°
Explanation of Solution
Formula is given below-
Goniometer setting value in terms of 2θ when diffracting crystal is LiF-
Value of d for LiF = 2.014
Wavelength of ka1 lines for Fe = 1.76
n =1
Put this value in equation (1)-
Wavelength of ka1 lines for Se = 0.992
n =1
Put this value in equation (1)-
Wavelength of ka1 lines for Ag = 0.497
n =1
Put this value in equation (1)-
(c)
Interpretation:
The goniometer setting to observe the ka1 lines for Fe (1.76
Concept introduction:
Bragg’s diffraction condition will be used for the calculation of goniometer setting. This formula is given as-
Where,
n = integer
λ= wavelength
d = interplanar distance of crystal
θ= angle
Answer to Problem 12.9QAP
Value of Goniometer setting in terms of 2θ when a crystal is NaCl-
For Fe = 36.4°
For Se = 20.3°
For Ag = 10.00°
Explanation of Solution
The formula is given below-
Goniometer setting value in terms of 2θ when a diffracting crystal is NaCl-
Value of d for NaCl = 2.820
The wavelength of ka1 lines for Fe = 1.76
n =1
Put this value in equation (1)-
Wavelength of ka1 lines for Se = 0.992
n =1
Put this value in equation (1)-
Wavelength of ka1 lines for Ag = 0.497
n =1
Put this value in equation (1)-
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Chapter 12 Solutions
Principles of Instrumental Analysis
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