A cuprophane dialysis membrane separates two compartments with a volume of $100ml.$ The left compartment contains a solution of $5*{10}^{-3}M$ sodiumpolyacrylate and the right compartment a solution of ${10}^{-3}M$ sodiumchloride. The membrane is permeable for the $N{a}^{+}$and $C{l}^{-}$ions but not for the negatively charged polyacrylate ions. Calculate the sodium and chloride concentrations at both side of the membrane at equilibrium.