1. If 36.2 mL of 0.158 M CaCl 2 solution is added to 37.5 mL of 0.149 M Na 2 CO 3, what mass of calcium carbonate, CaCO 3, will be precipitate? CaCl 2 (aq) + Na 2 CO 3 (aq)  CaCO 3 (s) + 2 NaCl (aq)

2. When aqueous solutions of lead (II) ion are treated with potassium chromate solution, a bright yellow precipitate of lead (II) chromate, PbCrO 4, forms. How many grams of lead chromate form when a 1.00 g sample of Pb(NO 3 ) 2 is added to 25.0 mL of 1.00 M K 2 CrO 4 solution?

3. One way to determine the amount of chloride ion in a water sample is to react the sample with standard AgNO 3 solution to produce solid AgCl. Ag + (aq) + Cl - (aq)  AgCl (s) If a 25.0 mL water sample requires 27.2 mL of 0.104 M AgNO 3 in such a reaction, what is the concentration of Cl - in the sample?