1g of salt is suddenly placed at the bottom of a beaker of water2cm diameter and 10 cm tall. Assuming the diffusion coefficient forsalt in water is 2*10^-5 cm^2/s, the solubility limit (Co) for saltin water is 200 g/l, and a one dimensional process:

a. Write down the governing equation and their solution for thisproblem.

b. How long will it take for salt to diffuse to the watersurface? (Use C/Co=0.01)

c. Sketch the salt concentration profile (i.e the variation ofsalt concentration with height) at the time calculated in partb)

d. What is the salt concentration at the water surface in 14.5weeks?

e. Sketch the salt concentration profile after a very longtime.

f. What is the salt concentration in the beaker at this time(very long time).

Answer rating: 100% (QA)

a Answer Time of diffusion of a substance is calculated by this formulae x 2 ... View the full answer