This is from a previous year but it will teach you how to do a complex solutions stoichiometry problem. Do these two problems for the homework- 300 ml of 2 M magnesium chloride is added to 500 ml of 3 M silver nitrate. Find the ending concentrations of all ions. 500 ml of 1M NaBr is added to 500 ml of 1M mercury acetate. FInd the ending concentrations of all ions AND the mass of the precipitate.