In a colloidal dispersion solute particles are large enough to be discernible by the naked eye. (1) (2) (3) The selectivity of a semi-permeable membrane is based on polarity differences among molecules. For dilute aqueous solutions, % (m/m) and % (m/v) concentration units have almost the same magnitude because the density of water is 1.00 g/mL and the solution is almost entirely water. a) All three statements are true. b) Two of the three statements are true. Only one of the statements is true. d) None of the statements is true