2. Passing a solution of Ca(NO3)2 and Na2SO4 through a cation exchange resin would give an eluate that is
(a) neutral. (b) acidic.
3. A gel-filtration column has a radius of 0.75 cm and a length of 30.0 cm. If 70% of the volume of the column is occupied by the stationary phase and the volume inside the pores, calculate the void volume.