Chem 120, Experiment 4 Report
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Quiz Section No.:
EXPERIMENT 4 − CLASSES OF CHEMICAL REACTIONS
TABLE FOR CHEMICAL EQUATIONS:
A) Combination Reactions:
1) Heating of aluminum:
Observation:
Chemical Equation:
2) Heating of copper:
Observation:
Chemical Equation:
B) Decomposition Reactions:
1) Decomposition of ammonium carbonate: All observations
2) Decomposition of potassium iodate: Observations and chemical equations
3) Reactions of silver nitrate: Observations and chemical equations
Test tube no. 1
Test tube no. 2
Test tube no. 3
Chem 120, Experiment 4 Report
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Quiz Section No.:
4) Compound formed in test tube no. 1 after heating
C) Single Replacement Reactions
Test tube
no.
Solution
Metal
1
H 2O
Ca
2
H 2O
Fe
3
H 2O
Cu
4
3 M HCl
Zn
5
6 M HCl
Pb
6
6 M HCl
Cu
7
0.1 M
NaNO3
Al
8
0.1 M
CuCl2
Al
9
0.1 M
AgNO3
Cu
Test tube
no.
Solution
Metal
1
H 2O
Ca
2
H 2O
Fe
3
H 2O
Cu
4
3 M HCl
Zn
5
6 M HCl
Pb
6
6 M HCl
Cu
7
0.1 M
NaNO3
Al
8
0.1 M
CuCl2
Al
Observations
Balanced chemical equations
Chem 120, Experiment 4 Report
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Quiz Section No.:
0.1 M
AgNO3
Cu
D) Double Replacement Reactions
Test tube
no.
Solution 1
Solution 2
1
0.1 M NaCl
0.1 M
KNO3
2
0.1 M NaCl
0.1 M
AgNO3
3
0.1 M
Na2CO3
3 M HCl
4
3 M NaOH
3 M HCl
5
0.1 M BaCl2
3M
H2SO4
6
0.1 M
Pb(NO3)2
0.1 M
K2CrO4
7
0.1 M
Fe(NO3)3
3 M NaOH
8
0.1 M
Cu(NO3)2
3 M NaOH
Test tube
no.
Solution 1
Solution 2
1
0.1 M NaCl
0.1 M
KNO3
2
0.1 M NaCl
0.1 M
AgNO3
3
0.1 M
Na2CO3
3 M HCl
4
3 M NaOH
3 M HCl
5
0.1 M BaCl2
3M
H2SO4
6
0.1 M
Pb(NO3)2
0.1 M
K2CrO4
7
0.1 M
Fe(NO3)3
3 M NaOH
Observations
Balanced Chemical Equations
Chem 120, Experiment 4 Report
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Quiz Section No.:
0.1 M
Cu(NO3)2
8
3 M NaOH
ANSWERS TO QUESTIONS:
1.
Gold metal, Au, is valuable not just because it is rare but also because it is so durable. Au will not dissolve
in hydrochloric acid or nitric acid. It takes a combination of the two to dissolve gold. Calcium metal, Ca,
2+
on the other hand reacts with water, H2O, to form Ca ions. What information presented in this lab could
enable you to predict this difference in reactivity.
2.
From the following list of chemicals, select three combinations that would lead to a double displacement
reaction. Write the complete, balanced equations for the reactions.
LiBr
3.
HNO3
AgNO3
Pb(NO3)2
Na2SO4
Potassium chlorate, KClO3, decomposes upon heating. Explain what is meant by a decomposition
reaction. Write the complete balanced equation for the decomposition. What gas is given off, and how
may it be detected? What chemical can be used to detect the remaining salt? Write and balance the
chemical equation for this reaction.
Chem 120, Experiment 4 Report
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Quiz Section No.: