Problems
k = 1.3805 x 1(T^23 JK'^1
NA = 6.0225 x lO^moP^1
R = 8.314 3 J K-^1 moP^1
e = 1.602 1 x UP^19 C
e 0 = 8.8542 x KP^12 FnP!
g = 9.806 6 m s~^2
Volume of ideal gas at s.t.p. (0°C and 1 atm)
= 2.241 4 x HP^2 m^3 mop^1
1 atm = 760mmHg = 1.013 25 x 105 Pa
0°C = 273.15 K
In 10 = 2.302 6
TT = 3.141 56
rj (water, 25°C) = 8.9 x 10"^4 kg m"^1 s^^1
e/€ 0 (water, 25°C) = 78.5
- Calculate the average displacement in 1 min along a given axis
produced by Brownian motion for a spherical particle of radius 0.1 JAIH
suspended in water at 25°C.
- The sedimentation and diffusion coefficients for myoglobin in
dilute aqueous solution at 20°C are 2.04 x 10"^13 s and 1.13 x 10"^10
m^2 s"^1 , respectively. The partial specific volume of the protein is
0.741 cm^3 g"^1 , the density of the solution is 1.00 g cm"^3 and the
coefficient of viscosity of the solution is 1.00 x 10~^3 kg in"^1 s"^1.
Calculate (a) the relative molecular mass and (b) the frictional ratio of
this protein. What is the probable shape of a dissolved myoglobin
molecule?
- An aqueous solution of p-lactoglobulin in the presence of
sufficient electrolyte to eliminate charge effects was centrifuged to
