After performing a dilution calculation, you determine you need 25.0 milliliters of an aqueous stock solution to make 100.0 milliliters of a new solution. How would this be prepared? Add 25.0 milliliters of the stock solution to a volumetric flask, then add 100.0 milliliters of water. Add 25.0 milliliters of the stock solution to a volumetric flask, then add water to a total volume of 100.0 milliliters. Add the stock solution and water in equal amounts until 100.0 milliliters is reached. Add 25.0 milliliters of water to a volumetric flask, then add the stock solution to reach a total volume of 100.0 milliliters.