- 11 Diffusion Clock 2p 2p In The Lecture You Have Been Introduced To The Diffusion Clock Experiment Figure 1 I 1 (192.43 KiB) Viewed 17 times
- 11 Diffusion Clock 2p 2p In The Lecture You Have Been Introduced To The Diffusion Clock Experiment Figure 1 I 2 (77.46 KiB) Viewed 17 times
11. Diffusion clock [2P+2P] » In the lecture you have been introduced to the ” diffusion clock” experiment (Figure 1). Initially, a layer of blue CuSO4 solution is placed in the bottom of a glass tube with water added on top of the solution. Over time, one can see that the gradient vanished due to the diffusion of the Cu2+ (m = 63.54, D = 7.5 x 10-10 m?s-1 at T=25°C) ions but only on the time scale of several years. = Figure 2: Diffusion clock
(a) Consider a glass cylinder with a length of 2 m. Determine the time at which ”perfect mixing” of the solutions is reached! Hint: Assume that the tubes diameter d is much smaller than its length 1 and that all Cu ions are initially located at the bottom of the tube. (b) To what extent does the gravitation affect the process?