Suppose that you precipitate a protein with 1 M (NH4)2SO4 and that you wish to reduce the concentration of the (NH4)2SO4. You take 1 ml of your sample and dialyze it in 1000 ml of buffer. At the end of dialysis what is the concentration of (NH4)2SO4 in your sample? How could you further lower the (NH4)SO4 concentration?