Thursday, March 12, 2020
Chemistry Experiment Essays
Chemistry Experiment Essays Chemistry Experiment Essay Chemistry Experiment Essay The members in our group were Whitney, myself, and Charlotte. The title of this lab was Ã¢â¬Å"reaction types. Ã¢â¬ The purpose of this lab was to identify the reaction type, balance equations, and observe the reactions . Our hypothesis was if there was many stations with fire, then theyÃ¢â¬â¢re would be many combustion reactions. The procedure of the first lab was to place a solid piece of magnesium metal in the bottom of the smallest tube. Place this test tube in the test tube holder. Using tongs pick up the large test tube and have it turned upside down, ready for the reaction.Place 6 drops of HCL into the small test tube with the metal. Immediately cap with the largest test tube and hold there until bobbling stops. Have another group member light a splint with the match and then blow it out. Quickly lift the test tube and put the glowing splint into the tube. Record observations and answer the lab questions. For cleanup, place splints in the dish with water. Dump your produc ts into the evaporating dish at the station. Rinse the small test tube with water and return all items as you found them.The materials included the tongs, large test tube, small test tube, evaporating dish, and blow torch. The data we found was that it turned blue after a period of time. The reaction was CoN- OH. The second station was very interesting. The procedure was to place 3 small drops of cobalt nitrate into a test tube in the rack. Place 6 drops of sodium hydroxide in the second test tube. Pour test tube into test tube one. Record the results. Dump the contents of the first tube into the filter funnel that has already been set up for you.Rinse both tubes and return to the test tube holder. Leave all items as you found them at your station. The data we recorded was that bubbles formed on pencil led, and one of the batteries anodes turned slightly yellow. The reaction was H20- 2H (g) + O2. The next station was at number four. The procedure was to hook one mechanical pencil le ad to each of the alligator clips at the station. Pour enough water into the evaporating dish so that it is half full. Add several drops of bromthymol blue until the water is a rich blue green color.Connect one end of the alligator clip to cathode of the battery and place the pencil lead into the water. Wait three minutes. The reaction we concluded was NA (OH) (aq) + HCL (aq)- H (OH) + NACL. The fourth reaction was to add 10 ml of water to a 50 ml beaker. Add one drop of phenylthalein to the beaker. Record any observations. Add drops of hydrochloric acid while stirring until the mixture turns clear. Rinse any remaining material down the sink and be sure to completely wash out the small beaker. Return all materials to desk. The data we recorded was that it turned pink, with lines of purple in it.The fifth reaction was to add a few pieces of copper shot to a small test tube containing ammonium hydroxide. Let the reaction sit, while agitating gently for a few minutes. Note any changes that occur. When done, dump the remaining liquid in the trash. Rinse and return materials to station. We recorded the reaction as Mg (s) + O2. The seventh reaction was to hold a piece of magnesium metal in the flame of a blow torch for a few moments. Try not to stare directly at the light. The data we recorded was that it burned blue, and the reaction was C2H6 KO2- 2CO2+3H20.