Discussion exp6

Discussion exp6 - James Riddle jr39592 Experiment 6 The...

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James Riddle jr39592 Experiment 6 – The Reactions of a Copper Cycle Desai, K The first objective of this experiment was to observe and record the chemical and physical changes that occur when metallic copper is carried through a series of chemical reactions. The second two objectives involved learning how to balance and classify different reactions involved in the copper cycle and how to recognize and write the formula unit, total ionic, and net ionic equations for the precipitation and acid-base reactions in the copper cycle. (1) The first reaction was an oxidation-reduction reaction involving solid copper and aqueous nitric acid to produce aqueous copper (II) nitrate, gaseous nitrite, and liquid water. When the nitric acid was added, the solution turned green and then turquoise and finally a blue color. While the piece of copper was fizzing, it gave off nitrite gas which is a chemical change. When the distilled water was added to bring the solution to 150 mL, the blue color turned light blue. This light blue color was caused by the copper ions having a blue color in solution. The change in temperature, due to the reaction being exothermic, is also a chemical change. The second reaction was a precipitation reaction involving aqueous copper (II) nitrate and aqueous sodium hydroxide producing solid copper (II) hydroxide and
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This note was uploaded on 07/17/2011 for the course CH 204 taught by Professor Leytner during the Fall '08 term at University of Texas.

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Discussion exp6 - James Riddle jr39592 Experiment 6 The...

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