Diffusion and Osmosis - Review

13. In the photo below, the molecular weights and rates of

diffusion are compared.

.

Potassium permanganate (mw 158.03)on the left and Rose Bengal (mw 1017.68) on the right.

The relationship between molecular weights and rates of diffusion are: _______________________

As you can see the diameter of the diffuison ring is larger with potassium permanganate than the diameter of the diffusion ring of Rose Bengal. As the weight increases the rate of diffusion decreases.