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copperreaction

Chemistry

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copperreaction

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  1. Copper Reactions NervanaSolito DaineSunico Karl Brendan Tomalon

  2. Materials and Methods

  3. Data and Results Percentage yield = mass of copper recovered / mass of copper wire X 100

  4. To illustrate concepts like theoretical, actual, and percentage yield, the chemical reactions of copper Are used. As impure copper is dissolved in ntric acid and finally recovered, the chemical reactions Involved in the process are the following:.

  5. The first thing that we did was to add the nitric acid to the copper wire in the beaker. We have observed that the copper was dissolved, probably because of the acidity of the compound. We also noted the color which is light green. Then we poured distilled water into the beaker until it was half filled.

  6. When we added the sodium hydroxide to the aqueous copper nitrate, we have observed that from light green, the color change to light blue. Then, we prepare it for boiling by adding 3 pieces of boiling chips to the beaker. While boiling, we witness that the color change again the change of it’s color, from light blue it becomes black.

  7. When we added the sodium hydroxide to the aqueous copper nitrate, we have observed that from light green, the color change to light blue. Then, we prepare it for boiling by adding 3 pieces of boiling chips to the beaker. While boiling, we witness that the color change again the change of it’s color, from light blue it becomes black. Then, we filter the mixture with very hot distilled water.

  8. Then, we dissolve the black precipitate in 15 ml 6 M H2SO4 Next, we added 2g zinc metal into the mixture. We stirred it until it becomes colorless.

  9. After that, we collected the solids by decantation and we wash the solids with 10 ml methanol and ethanol. We heated the the beaker with the recovered copper over a water bath until the solids are dry and we calculate the percentage yield by dividing the mass of recovered copper by mass of the copper wire multiplies by 100 (.599/1.017) and we got the value 58.899% as stated in the first table.

  10. References • Samonte, Joseph B.; Figueroa, Lolibeth V..2007.General Chemistry Laboratory Manual. 3rd Ed. C&E Publishing,Inc.Philippines • Grassmont. “Copper Reactions”.Retrieved 16 January 203 from http://www.grossmont.edu/cwillard/Chemistry%20141/Labs/chem%20141%20lab%20manual/Copper%20Rxns%20Fa10.pdf

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