Calculation of molarity, molarity as conversion factor, dilution 3. Calculate the molarity of a solution that is made from dissolving 5.28 mg of sodium chloride in 48.5 mL of water. Assume the solution volume is equal to the solvent volume. How many kilograms of sodium are in 12.5 L of a 5.82 M aqueous solution of sodium carbonate? 4. 5. How many liters of an aqueous 4.95 M HCl solution are required to prepare 10.0 L of a 0.510 M solution?