Cycle of copper lab 6.docx

Reaction 1 under the fume hood 2 ml of 6 m nitric

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[Reaction 1] Under the fume hood, 2 mL of 6 M nitric acid was measured into a graduated cylinder and then added to the test tube. A hot water bath was prepared under the hood, and the test tube was placed into the water bath to heat the mixture until all the copper dissolved and no more nitrogen dioxide was produced. The observations of the reaction were recorded. The test tube was removed from the hot water bath (by hand) and placed in a rack.
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[Reaction 2] A 50 mL beaker was cleaned and dried. Around 5 mL of 6 M sodium hydroxide was poured into the 50 mL beaker. Using a pipette, the 6 M sodium hydroxide was added drop-by-drop to the experimental test tube, and was mixed well until the solution was basic, as indicated by the litmus paper. The observations of the reaction were recorded. [Reaction 3] A hot water bath was set up on a hot plate. The experimental test tube was then placed in the water bath and heated until the precipitate from Reaction 2 became black powder. When all of the precipitate from Reaction 2 had been fully produced, the test tube was removed from the hot water bath and placed in the rack to cool to room temperature. A 50 mL beaker was then cleaned and dried, and around 5 mL of distilled water was poured into the beaker; 2 mL of the distilled water was poured and measured into a clean dry 10 mL graduated cylinder, and then poured into the experimental test tube. The contents of the test tube were mixed with a stirring rod and the solid was allowed to settle. The excess liquid was decanted with the use of a pipette and placed into the proper waste container. This process was repeated. All observations were recorded. [Reaction 4] A beaker was cleaned and dried, and 3 M sulfuric acid was poured into the beaker. The acid was poured into a clean 10 mL graduated cylinder until the 6 mL line. These 6 mL of 3 M sulfuric acid were poured into the experimental test tube with the copper oxide. The
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  • Fall '19
  • Chemistry, Sodium, Chemical reaction, Sulfuric acid

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