Cu Recycle Lab

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Cu Metal Recycling Lab
Mr. Nelson – Chemistry
Purpose: The purpose of this lab is to carry out an extensive series of reactions based on the element copper. These reactions include; synthesis, decomposition, single and double replacement. In this experiment, recycling will also be introduced. Procedure: See attached Story board.

Data and Observations and Data Analysis:
Step

Word Equation

1

Balanced
Chemical
Equation

Type of
Reaction

Observations

Copper + nitric
Cu + 4HNO3
acid à copper(II) à Cu(NO3)2 +
nitrate + nitrogen 2NO2 + 2H2O
dioxide + water

Combination??

-The liquid inside
seems to change
to green
-Brown gas
seems to form
-Bubbles seem to
form
-Green liquid
changes to blue

5

Copper(II)
nitrate + sodium
hydroxide
à copper(II)
hydroxide +
sodium nitrate

Cu(No3)2
+ 2NaOH à
Cu(OH)2 +
2NaNO3

Double
Replacement

-A solid seems to
form

6

Copper(II)
hydroxide à
copper(II) oxide
+ water

Cu(OH)2 à CuO
+ H2O

Decomposition

-The liquid turns
black

10

Copper(II) oxide
+ hydrochloric
acid à copper(II)
chloride + water

CuO + 2 HCl à
CuCl2 + H2O

Double
Replacement

-The liquid clears
up and turns blue

11

Copper(II)
chloride +
aluminum
à copper +
aluminum

3CuCl2 + 2Al à
3 Cu + 2 AlCl3

Single
Replacement

-When the
aluminum wire
was added, the
liquid began to
bubble.

chloride

Analysis Questions
1.
In general, list the observations that alerted you that some type of chemical change was occurring.
Change in color, change in temperature, forming of solids.
2.
Did each reaction show all the kinds of changes you listed above? Use your observations to justify your answer.
In Step 1, the liquid changes colors and a
gas forms. In Step 5, a precipitate is formed. In Step 11, bubbles began to form.

3.

What happened to the hydrogen gas generated in Step 11 of the Procedure? The hydrogen gas is released into the surrounding air.

4.
What happened to the aluminum chloride?
from the test tube using distilled water.

The aluminum chloride is washed

5.
How did Step 17 of the Procedure complete the series of chemical reactions? Step 17 of the Procedure completed the series of chemical reactions because I ended up with the ‘original’ substance; copper, ultimately recycling the copper metal. 6.

The series of chemical reactions is often called the “copper cycle”. Why? The series of chemical reactions is often called the “copper cycle” because at the end of these reactions, your product is copper.

7.

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