(a) Calculate the osmotic pressure in atm. and osmolarity in aqueous solution containing 0.15 mol L-1 KCl, 0.01 mol L-1 of CaCl2 and 0.1 mol L-1 of disaccharide lactose at 20 oC. (b) What will be the osmotic pressure and osmolarity in this solution if all lactose is hydrolysed to monosaccharides glucose and galactose?

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