We worked on a lab which examines some common synthesis reactions, and tests which indicate the change in the reactants to form products. The production of magnesium oxide by burning and then placing the white magnesium oxide into a beaker of water which contains the reagent phenolpthalein, a test for alkalinity. We studied the production of calcium carbonate by exhaling into a test tube of calcium hydroxide, the carbon dioxide reacting with the calcium hydroxide to form insoluble calcium carbonate. We discussed the production of copper sulfide and iron sulfide by heating iron and sulfur as well as copper and sulfur. Each reaction procedure involved noting and recording changes which were observed, as well as examining the chemical formula reactions.