8.11.4 Osmotic pressure of macromolecular solutions 4.1 Osmotic pressure of macromolecules At low molality H,O I=RT+A,mB 丌=cRT丌=BRT 丌RT M =x+R742 丌RT B M Valid for polymeric nonelectrolyte =RT+A,mB+ M A3i Can be used to determine molar mass of macromolecule within 104 106 g mol Virial factor = cRT RT M mB  = M RT mB =        = + + 2 2 3 1 B B B A m A m M RT m  Virial factor At low molality       = + B B A m M RT m 2  1 B B RTA m M RT m = + 2  Can be used to determine molar mass of macromolecule within 104~106 g mol-1 Valid for polymeric nonelectrolyte 8.11.4 Osmotic pressure of macromolecular solutions 4.1 Osmotic pressure of macromolecules P H2O c