Problem
a) Compare the molecular weights of NaCl and urea. What is the effect of molecular weight on diffusion rate? (i.e. If you have a solute with a higher molecular weight, how does its diffusion rate compare with a solute with a lower molecular weight?)
b) What is the effect of concentration on diffusion rate? (L.e. If you have a higher (solute], what happens to the diffusion of that solute?)
c) Note the molecular weight of NaCl. Why was it able to cross the 50 MWCO?