Using the van’t Hoff factors in Table 14.9, calculate the mass of solute required to make each aqueous solution:

a. A sodium chloride solution containing 1.50 * 10² g of water that has a melting point of -1.0 °C 

b. 2.50 * 10² mL of a magnesium sulfate solution that has an osmotic pressure of 3.82 atm at 298 K 

c. An iron(III) chloride solution containing 2.50 * 10² g of water that has a boiling point of 102 °C

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TABLE 14.9=Van't Hoff Factors at 0.05 m Concentration in Aqueous Solution i Expected 1 Solute Nonelectrolyte NaCl MgSO4 MgCl, KSO4 FeCl3 2 2 3 3 4 i Measured 1 1.9 1.3 2.7 2.6 3.4