Philosophy homework help. You could add aquous hydrochloric to the solution to precipitate out silver chloride. What volume of a 0.130 M aqueous hydrochloric solution is needed to precipitate the silver ions from 30.0 mL of a 0.225 M silver nitrate solution? You could add solid potassium chloride to the solution to precipitate silver chloride. What mass of potassium chloride is needed to precipitate the silver ions from 30.0 mL of a 0.225 M silver nitrate solution?