Transcript A Copper Mirror

Formation of a Copper
Mirror
A copper mirror appears on the inside of a
test tube when chemicals are mixed
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Purpose
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To show how to make a copper mirror using
hydrazine hydrate and copper (II) acetate.
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SDSMT
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Demonstration
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A large test tube and a 250mL beaker to set
the test tube in were the equipment used
Copper (II) acetate was added to the test
tube. Hydrazine hydrate was next added to
the test tube.
The test tube was rotated slowly while being
being heated gently over a micro-Bunsen
burner.
After the solution was heated for 1-2 minutes
copper metal plated out on the inside of the
test tube.
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Concepts
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Organic Compounds
Endothermic Reactions
Redox Reactions
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Inorganic Compounds
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Inorganic Compound - Compound that is
not carbon-based.
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The inorganic compound used in this
experiment was hydrazine hydrate
(molecular formula is H2NNH2 · x H2O).
Hydrazine hydrate is a reducing agent which
means that it loses electron and is oxidized
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Endothermic Reactions
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Endothermic Reaction - a reaction
that absorbs heat from the
surroundings.
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In this demonstration heat was added
to provide enough energy to cause
the reaction to occur. A microburner
was the heat source.
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Redox Reactions
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Redox Reaction
Oxidation-is the loss of electrons by a substance.
Reduction-is the gain of electrons by a substance.
•
These happen simultaneously in a redox
reaction.
Ca + (s) + 2H+ (aq) —› Ca2+ (aq) + H2 (g)
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Ca (s) is oxidized since it loses electrons
and 2H+ is reduced since it gains electrons.
In this demonstration the following happens:
Cu2+ + 2e- —› Cu
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The Cu2+ is reduced since it gains electrons.
The hydrazine hydrate gives up its electrons
and becomes nitrogen gas, N2
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Conclusion
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A copper mirror was made using
hydrazine hydrate and copper (II)
acetate
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Comments
Hydrazine hydrate has also been used
as a rocket fuel because of its ability
to convert to nitrogen gas and provide
thrust for rockets
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