So the rate of diffusion is dependent upon the speed of the molecules and the existence of a concentration gradient. What about the concentration of the particles themselves? Diffusion is dependent upon mean free path and concentration is inversely proportional to mean free path. So does that mean that the diffusion rate is inversely proportional to concentration? So if you had two compartments and two different scenarios: Case 1: 10M seperated from 1 M Case 2: 20M seperated from 11M Diffusion would be faster in the first case? This is confusing because apparently net flux here is the same according to my textbook since the difference is the same.