Making Solutions Worksheet (W 330) Solutions 1) Explain how you would make 750. mL of a 1.35 M KOH solution. 0.750 L KOH x 1.35 mole KOH x 59 g KOH = 56.7 g KOH 1 L KOH 1 mole KOH Measure 56.7 g KOH into a container and add water to 750 mL volume. 2) If you dilute 15.0 mL of a 12.0 M HCl solution to make a 2.50 M HCl solution what will the final volume be? (12.0 M)(15.0 mL) = (2.50 M) V2 V2 = (12.0 M)(15.0 mL) = 72.0 mL (2.50 M) 3) How many grams of magnesium bromide are needed to make 1.0 L of a 4.0 M magnesium bromide solution? 1.0 L MgBr 2 x 4.0 mole MgBr 2 x 184.3 g MgBr 2 = 737.2 g MgBr 2 1 L MgBr 2 1 mole MgBr 2 4) Why is the following procedure is incorrect: To make 1.00 L of a 1.00 M CaCl2 solution, dissolve 111 grams of calcium chloride in 1.00 L of water. Making a solution this way would result in a final volume greater than 1.00 L because the calcium chloride has volume too. The proper method would be to measure 111 g CaCl 2 into a container, then add water to 1.00 L volume.