Copper retrieval lab

Observation:

Before: Powdery with some solids. Black and it has a little copper color in it too.

After adding Hydrochloric solution: It is becoming harder, some more solids are forming,. It is starting to look like copper again

Filter paper: .98

Zinc: Bubbling, and its starting to turn black, dissolving, copper is coming out. Solid copper is forming on the zinc. It looks like corals.

Question:

1. During Investigation. Matter B.3, not all of the original copper powder reacted when you heated it in air.
1. A. What observational evidence leads you to think that the reaction was incomplete? Not all of the copper is dissolved.
2. How would you revise the procedure so that more copper oxide could form? React copper more

2. a. The mass of the original powdered copper that reacted was 1.36g
b. The percent of the total copper sample reacted 189% (this number may be incorrect because some small amounts of zinc might have still been present, which altered the weight)

3. In the reaction between copper chloride solution and zinc metal, in Investigation. Cu^2+ ion gained two electrons to form an atom of copper metal. Each zinc metal atom lost two electrons to form a Zn^2+

a. Write a balance chemical equation that represents this process:

CuCl+Zn-à Zn^2+Cl + Cu

B. Zinc+ Oxidized

Reactant reduced is copper chloride

The reducing agent: Coper Chloride

The oxidizing agent: Zinc

4

a. .After adding zinc the color became cloudy white

b. The reaction between copper and the zinc when the zinc is less reactive than copped, its going to change the copper ion back into the copper metal

c.The color results in the copper ion going into solution.

b. The hydrochloric acid

Each resource when into solution