Maiti+and+Brandon+Copper+Reaction


 * Reaction 1 || [[image:photo-1.JPG width="320" height="240" align="center"]]

|| For all of the following reactions we used; -a 250 ml beaker -a piece of copper -a petri dish

In the first reaction we pl aced our piece of copper and Nitric Acid into a beaker (pic. 1). First it turned greenish then red (pic 2). Then it turned brown and emitted brown smoke (pic 3). Then at the end it turned light blue (pic 4) Then we added water to the solution so that the solution was equal to 50 mL Cu+HNO3 -> Cu(NO3) + H2O || We stirred it in and then heated the solution. When we poured in the NaOH into the solution it turned dark blue and began to thicken a little. When we heated the solution it kept getting darker and darker until it was a blackish green color.
 * Reaction 2 || [[image:photo-6.JPG]] || For the second reaction we added 30-40 mL of Sodium Hydroxide (NaOH) to the solution containing the copper.

Cu(NO3)2 + NaOH -> Cu(OH)2 + NaNO3 || The CuO is a black solid. It settled down onto the bottom of the beaker with water on top of it. We then decanted this several times. Cu(OH)2 -> CuO + H2O || We added the HCl to the black liquid and it looked like the CuO was dissolving and it turned into a clear aqua green color. CuO -> CuCl2 ||
 * Reaction 3 || [[image:1.jpg width="240" height="316"]][[image:3.jpg width="320" height="424"]] || The third reaction was when the solution from reaction 2 decomposed into CuO and oxygen.
 * Reaction 4 || [[image:1.jpg width="240" height="317"]][[image:2.JPG width="240" height="317"]] || We added 30-40mL HCl (Hydrochloric acid) to the CuO.
 * *Side Step || [[image:1.jpg width="160" height="210"]][[image:2.JPG width="320" height="424"]]

|| We tried to neutralize the hydrochloric acid in the solution by adding NaOH. First the liquid turned a cloudy blue then we measured the PH and it was 3. So then we added more NaOH and the PH was 12. This reactionnot work and so the end solution was unknown. ||
 * Reaction5 || [[image:1.jpg width="480" height="360"]]

|| First we decanted to isolate the precipitate

then added 100 ML 3M HCL Then added 200 mL 1M Na3PO4

CuO-> CuCl2 Cucl2-> Cu3(PO4)2

When we added the HCl it went back to the clear aqua green color. Then once we added the Na3PO4 the solution turned a light blue with a white precipitate. || || First we separated the precipitate from the supernatant by filtering.
 * Sixth Reaction || [[image:7.jpg width="480" height="824"]]

Then we poured sulfuric acid (H2SO4) through the filter.

Cu3(PO4)2+H2SO4 -> CuSO4 + H3PO3

The copper stayed a light blue color through the entire reaction. ||