Eight 50 or 100 ml beakers 25 ml and 50 ml graduated cylinders Chemicals [Al(H 2O)6 ]Cl3 (0.10 M CH 3 COOH (aq) Acetic Acid) , NH4Cl,(0.10 M NaOH(aq)) Na2CO3(0.10 M HCl (aq)) NaHCO3 , CH3COONa3H2

(Deionized water) Spill/Disposal: All solutions from this experiment may be disposed of into the sink. Procedure Part I. Hydrolysis - Salts of Weak Acids or Weak Bases 1. Before coming to lab, Calculate the mass of each of the solids needed to prepare 25.0 mL of 0.10 M solution. Enter this mass on your data sheet and check with your instructor to make sure that you have the right mass.

Part II. Buffering Action of Acetic Acid-Sodium Acetate 1. Before coming to lab, calculate the weight of NaCH3COO.3 H2O (s) that you will need to make 50.0 mL of a 0.10M solution. The molar mass of the sodium acetate must include the waters of hydration.