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1. Sievert's Law
The diffusion in the steel film is of the hydrogen atom. Therefore,
2. Diffusion coefficient vs. transference number
For NaCl and KCl, use Eq. (6.1-12)
3. NH4OH vs concentration
First, calculate the diffusion coefficients,
From Eq. (6.1-12),
Chapter 6 Solute-solute interactions page 6-2
4. Intestinal diffusion
(a)
5. Activity corrections for electrolyte diffusion
By combining chemical potential with Debye-Huckel theory, we have
6. Diffusion in an ultracentrifuge
(a) By replacing the electrical force with the centrifugal force, we have
7. Diffusion of
-caprolactam
Use binomial series to expand the square root in Eq. (6.2-22)
8. Diffusion of sucrose
(a) From Stokes-Einstein equation,
0
9. Vignes’ equation
(a) From Vignes’ equation, the calculated results are plotted on the following figure.
1.2
1.4
data
The data do not fit this equation very well at lower x1.
(b) To calculate D0 from data, we rearrange Eq. (6.3-11) to become
Chapter 6 Solute-solute interactions page 6-4
x1 D 1 + ln1/lnx1 D0 (Vignes) D0 (6.4-11) D (Vignes)
Values of D0 from both Vignes and Eq. 6,3-11 are plotted in the following figure.
1
1.2
1.4
10. Diffusion through a consolute point
At steady state,
11. Gel permeation chromatography
0
12. Pore size for protein diffusion
Chapter 6 Solute-solute interactions page 6-5
13. Diffusion in catalyst pores
32 = 0.122 cm /s
14. Pore size in a membrane
