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The Chemistry Of Copper: Ap Chemistry Lab Report

708 words - 3 pages

The lab was to include a purpose, procedure, data/observations, all reactions and side reactions written out with qualitative data beneath each product and reactant except H20, and a summary.The purpose of this experiment is to observe the qualitative aspects of a series of reactions involving copper.Procedure1.Measure about 1g of solid copper.2.Place Cu in Erlenmeyer flask and place flask underfume hood.3.Add dropwise 15M HNO3 until solid copper is completely reacted.4.Place flask in water bath.5.Add 4M NaOH slowly until no more solid forms.6.Mix contents by slowly swirling flask.7.Place flask back in water bath, heat to boiling, and stir.8.Heat until separation of solid and solution.9.Cool flask and allow contents to ...view middle of the document...

7.When HCl is added, a bluish/green solution forms.8.When solid Al is added, bubbles form and the intensity of the solution's color diminishes.9.When reaction is complete, orange/bronze solid and clear, colorless solution is visible.Reactions1.Cu + 4HNO3 =Orange/Bronze Solid Clear, Colorless LiquidCu(NO3) 2 + 2NO2 + 2H2O Clear, Blue Liquid Red/Brown Gas2.Cu(NO3)2 + NaOH =Clear, Colorless LiquidCu(OH)2 + 2NaNO3Blue, Solid Precipitate Clear, Colorless Liquid3.Excess HNO3 + NaOH = NaNO3 + H2O4.Cu(OH)2 + 2HCl =Black, Crystalline Solid Clear, Colorless LiquidCuCl2 + 2H2OBlue/Green Solution5.3CuCl2 + 2Al =Silver Solid3Cu + 2AlCl Orange/Bronze Solid Clear, Colorless Liquid6.Excess 6HCl + 2Al = 3H2 + 2AlCl3Colorless GasSummaryThis experiment allows us to observe copper as it goes through a series of reaction. We begin with copper as a pure solid with an orange/bronze color. Then, it becomes part of a clear, blue solution when HNO3 is added. Next, we see it as a solid, blue precipitate with the addition of NaOH. Then, it becomes a black crystalline solid when heated. Next, a blue/green solution in formed when HCl is added. And finally, when solid aluminum is added it reverts back to pure solid copper. If we had enough time for complete reactions to occur, the mass of copper at the end should have been the same as the mass of copper we started with.Sorry if its a little confusing, copy and paste didn't work out so well. I tried to fix it the best I could.CorrectionsFor some reason I can't change this.In reaction 2, clear,colorless liquid should be under NaOHIn reaction 5, silver solid should be under 2AlIn reaction 6, colorless gas should be under 3H2

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