Question

29) What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.225 M in sodium chloride and 0.063 M in magnesium sulfate? Assume complete dissociation for electrolytes.

27) If an 0.880 m aqueous solution freezes at –3.50 °C, what is the van\'t Hoff factor, i, of the solute? Kf values can be found here.

26) Assuming 100% dissociation, calculate the freezing point and boiling point of 2.75 m Na2SO4(aq). Constants may be found here.