1) When aqueous solutions of magnesium sulfate and ammonium carbonate are combined, solid magnesium carbonate and a solution of ammonium sulfate are formed. The net ionic equation for this reaction is:

2) When aqueous solutions of sodium acetate and hydroiodic acid are mixed, an aqueous solution of sodium iodide and acetic acid results. Write the net ionic equation for the reaction.
3) An aqueous solution of potassium hydroxide is standardized by titration with a 0.119 M solution of hydrochloric acid.
If 27.4 mL of base are required to neutralize 22.2 mL of the acid, what is the molarity of the potassium hydroxide solution?
4) An aqueous solution of barium hydroxide is standardized by titration with a 0.151 M solution of hydrochloric acid.
If 29.1 mL of base are required to neutralize 21.1 mL of the acid, what is the molarity of the barium hydroxide solution?
5) Identify the species oxidized, the species reduced, the oxidizing agent and the reducing agent in the following electron transfer reaction.
3Sn2+ + 2Cr3Sn + 2Cr3+
As the reaction proceeds, electrons are transferred from to .