Classes of Chemical Reactions :: essays research papers

Classes of Chemical ReactionsWhenever a reaction takes place, energy is changed as well when the substances react chemically. Scientists have taken these changes in energy and generalized them. Scientists can take these generalizations and discover more active the nature and tendencies of matter. In this lab, the purpose was to perform seven reactions, write knock off their equations, and identify the type of reaction. In this lab report, several methods of displaying this information will be applied.Synthesis1.A piece of Magnesium was obtained at about ii centimeters in length. The strip was thin and easily bent or twisted. It had a metallic surface and was brittle. It was silver in pretext. A flame from a bunsen burner was held to the Mg, and it ignited, giving off a brilliant white light. Looking directly into the light resulted in temporary blindness, which would explain the warning on the procedures that strongly suggested not looking directly into the light. After the fl ame had extinguished itself due to lack of fuel, the Mg had turned from a metallic strip to an off-white powder, which crumbled at the slightest irritation. The magnesium had bonded with the oxygen gas in the air from the energy that was applied to it and formed magnesium oxide. The type of reaction was a synthesis reaction, as is shown by this equation.2Mg(s) + O2(g) = 2MgO(s) 2.A piece of copper was obtained. It was a small, rounded wire that could be bent, although with a greater difficulty than the Mg strip from the previous account. It was copper in color (never saw that one coming, didja) and had a metallic luster. The copper was put in the flame of a Bunsen burner and after several seconds, it began to moodyen. The flame was applied to it for about a minute and a half, and the copper appeared silvery under intense heat, but when it was removed from the flame, the silver color quickly faded. The copper strip was nowadays black all over, and the change in color suggested tha t a chemical change had occurred. The Cu had reacted with the oxygen in the air and formed copper oxide. The black color could be scraped off, but only in small slivers. It would crumble when it was irritated with a great deal of pressure, respectively. It was a synthesis reaction as displayed by the equation here.Cu(s) + O2(o) = CuO2