Evidence of Chemical Change Essay

PurposeTo observe several(prenominal) chemical changes (reactions) and the evidence they exhibit for chemical change.DataSee foliate 3AnalysisThe two terms that describe possible sinew change in a chemical reaction argon Exothermic, for usage when a gas is formed when dogshit II Chloride and Aluminum are mixed, and Endothermic, for example when copper II Hydroxide is heated.There are many another(prenominal) substances used in this test, the elements are Hydrogen Gas, Aluminum, and warm grunter, the compounds are Copper II Nitrate, sodium Hydroxide, Copper II Hydroxide, Copper II Oxide, Hydrochloric Acid, Sodium Nitrate, H2O, Copper II Chloride, and Aluminum Chloride.In the last step of this experiment Aluminum Chloride is not a solid like it should be at room temperature, it is dissolved into the mixture. In order to recover the Aluminum Chloride as a solid, you would have to evaporate out all of the peeing.The color of the termination Copper II Nitrate is blue and the co lor of the solution Copper II Chloride is blue. Of all the substances listed in the second question, the ones that dissolve in water are Sodium Nitrate, Aluminum Chloride, Copper II Nitrate, Sodium Hydroxide, and Hydrochloric Acid, the substances that do not dissolve in water are Copper II Hydroxide, Copper II Oxide, solid Copper, Aluminum, and Copper II Chloride.These equations are pen referring to the procedures in this experimenta) copper(II) nitrate + sodium hydroxide copper(II) hydroxide + sodium nitrate b) copper(II) hydroxide (+ heat) copper(II) oxide + H2O c) copper(II) oxide + hydrochloric acid copper(II) chloride + H2O d) copper(II) chloride + atomic number 13 solid copper + aluminum chloride e) aluminum + hydrochloric acid hydrogen gas + aluminum chlorideFour general observations seen in this experiment that indicate a chemical change has occurred are color change, energy change, gas formed, and solid formed.