Shaquaria Wallace
11/29/12
Copper Cycle Lab Report
(Your lab report will be due by email to tbamannion@gmail.com or on paper by next Friday
12/7)
Abstract:
In this lab my group and I experienced in copper. We started off with copper and during this
process we added many chemicals to see how copper will react and at the end with ended up
back with copper. But just remember copper never disappeared it just simply was going with
different partners (chemicals) to see how it will react. We used copper power, breaker, water
etc..
Materials:
Copper power
Sulfuric acid (1m)
Nitric acid (8m)
Zinc filings
Sodium hydroxide (8m)
Water
Beaker
Metal spatula
Glass rod
Grautuated cylinder
Filter paper
Funnel
Tongs
Hot plate
Goggles
Erlenmeyer flask
Pipette
Fume hood
Procedures:
1.
2.
3.
4.
Measure out 0.10 g of copper powder
Place the copper in a 250 mL beaker
Slowly add 2 ml of concentrated nitric acid (8m) to the copper
When the brown gas is no longer being produced, remove the beaker
from the fume hood
5. Add approximately 25 ml of water
6. Slowly add 2 ml of sodium hydroxide (8m) to the beaker. Be sure to look
for any solid that begins to appear scattered throughout the liquid
7. Heat the beaker on the hot plate set it medium. Stir with the glass stirring
rod while heating.
8. Use tongs to move the beaker from the hot plate to the lab bench.
9. Filter the solution with a funnel and a piece of filter paper.
10.
Gently scrape the solid from the paper using a small spatula into a
100 ml beaker
11.
Add 15 ml of sulfuric acid (1m) slowly while stirring. As you add the
acid observe any changes in the liquid and solid.
12.
Measure approximately 0.1 g of zinc filings to within 0.098 g to
0.102 g. add the zinc to the beaker.
13.
Pour off most of the liquid.
Clean up your area
Data :
What you did
Chemical added
What you saw
(observations)
Got copper from the
teacher
Added nitric acid
Cu (s)
Added sodim
hydroxide
NaOH(aq)
Reddish brown
powder
A brown gas
bubbled out and
then there was a
blue solution
A dark blue cloud
formed in the
solution
Black solid formed in
the liquid
Black solution
Added heat
HNO3(aq)
----
Added sulfuric acid
H2SO4 (aq)
Added zinc
Zn (s)
Bubbled and then a
reddish brown
Chemical Formula
and Name of copper
compound
Cu (s)
Solid copper
CU(NO3)2 (aq)
Copper nitrate
solution
Where is the
copper?
Cu(OH)2 (aq)
Copper hydroxide
solution
CuO4 (aq)
Copper sulfate
CuSO4 (aq)
Copper sulfate
Cu(s)
In the copper
hydroxide solution
In the copper
powder
In the copper nitrate
solution
In the copper oxide
solid
In the copper sulfate
solution
In the beaker as a
solid again
powder appeared
Analysis:
My group and I started with copper powder and added nitric acid. A brown gas
(nitrogen dioxide) escaped and the blue solution that was left was copper nitrate. Then we
added sodium hydroxide which created a dark blue cloud (copper hydroxide). Then my group
mate added heat to the solution, which we put the beaker on top of the heat plate, which then
formed a black liquid (copper oxide). Afterwards my next group mate added sulfuric acid, and
then it turned into a blue liquid (copper sulfate). At the end we then added zinc which bubbled
and a reddish brown powder appeared.
Discussion:
1.
2.
3.
4.
5.
6.
7.
8.
What happened to the copper in this lab? It is changing partners. Did it disappear or
was it destroyed? No it just kept changing after its being bond with different
elements.
Did the copper always look the same? No, every time we added a different chemical
the color which then changed. Why do you think that was? Because each chemicals
has different types of reacting in it.
What types of compounds are Cu(NO3)2 , Cu(OH)2 , CuO , CuSO4 ? Ionic
compounds.
What element is the cation for each of these compounds? Copper
Honors/Extra Credit: What charge does the cation have? Positive. /How do you
know? Because it’s on the right side of the periodic table.
What happens to the anion? It gets electrons added to them because they don’t
have enough electrons. Is it always the same? No depending on the element.
Honors/Extra Credit: What type of chemical reaction is it when the ions switch
places? It’s called double replacement.
Honors/Extra Credit: Why are the formulas for copper nitrate and copper
hydroxide written with parentheses and a 2 like this: Cu(NO3)2 , Cu(OH)2 ? So it
can show how many it has and what’s added.
Conclusion:
In this experiment the copper was combing with different elements which cause it to react
differently with the color and how it forms and smells. This laboratory experiment is called the
copper cycle because during this experiment it kept switching to different forms. It also went
through many changes with its color and how it looks. Like for example when we added nitric
acid it started to bubble and had a blue color solution to it, then when we added sulfuric acid it
clumped into a reddish brown clumps of what it looked like dirt. When atoms was added it was
never destroyed it just turn into a different solution. It tells me that depending on the chemical
that is added it changes it form like it’s always there it just looks different until it goes back to
its original form.
Copper Cycle Lab Report
Category
Advanced 8
Proficient 6
Abstract
Abstract is a thorough summary Abstract covers all aspects of the Abstract covers only some
of the lab report.
lab report but is not thorough.
aspects of the lab report.
Abstract does not cover that
many aspects of the lab
report.
Materials
All materials are listed, both
chemicals and non-chemicals.
Most materials are listed.
Some materials are listed.
Little or no materials are
listed.
Procedure
All procedures are written.
Most procedures are listed.
Some procedures are listed. Little or no procedures are
listed.
Data
Data table is filled in completely. Data table does not have
subscripts written properly.
Analysis
The analysis summarizes the data The analysis summarizes most of The analysis summarizes
in paragraph form.
the data.
some of the data.
Discussion
The discussion questions are
answered thoroughly and
correctly.
Conclusion
The conclusion section includes a The conclusion section includes
conclusion about the lab and
conclusions just about the lab.
elements in general.
Spelling,
Punctuation,
Grammar
There are no spelling,
punctuation, or grammar
mistakes.
There are few spelling,
punctuation, or grammar
mistakes.
On Time
The lab report is turned in on
time
The lab report is 1 day late.
The discussion questions are
mostly answered correctly.
Developing 4
Data table is missing some
information.
Beginning 2
Data table is mostly
incomplete.
The analysis summarizes
little or none of the data.
The discussion questions are The discussion questions are
somewhat answered
mostly answered
correctly.
incorrectly.
The conclusion section does
not make real conclusions
about the lab.
There are some spelling,
punctuation, and grammar
mistakes.
Grade _______ / 72
There are many spelling,
punctuation, and grammar
mistakes.
The lab report is more than
1 day late.