CHEMISTRY USA TEST PREP(OXIDATION) ALREADY GRADED(A Guaranteed A+ Guide)
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Course
CHEMISTRY USA PREP
Institution
CHEMISTRY USA PREP
D
One classic chemistry experiment involves the reaction of hydrochloric acid and
magnesium ribbon. A small piece of magnesium ribbon is placed in a test tube and
hydrochloric acid is added to cover the magnesium. Students observe that the test
tube gets hot, a gas (bubbles) is produced, and...
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CHEMISTRY USA TEST PREP(OXIDATION)
D
One classic chemistry experiment involves the reaction of hydrochloric acid and
magnesium ribbon. A small piece of magnesium ribbon is placed in a test tube and
hydrochloric acid is added to cover the magnesium. Students observe that the test
tube gets hot, a gas (bubbles) is produced, and when a lit match is inserted in the
mouth of the test tube, a loud "bark" is heard. This reaction is represented by the
equation:
Mg + 2HCl → MgCl2 + H2
The reaction can be described as both a _____________ reaction and a(n) ____________
reaction.
A) synthesis; endothermic
B) neutralization; exothermic
C) decomposition; neutralization
D) single replacement; exothermic
B
Page 1 of 22
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,During chemistry lab, the teacher demonstrated the electrolysis of water. Using an
electrolysis apparatus, she ran an electric current through a volume of water.
Hydrogen bubbles began to collect at the cathode and oxygen at the anode. The
chemical reaction is represented by the equation:
2H2O(l) → 2H2(g) + O2(g)
The electrolysis of water is a __________ reaction.
A) combustion
B) decomposition
C) neutralization
D) double replacement
D
Jose and Sue were investigating the formation of precipitates in chemistry lab.
They mixed a silver nitrate solution with a sodium chloride solution and
immediately a white solid appeared in the bottom of the test tube. This white solid
is a precipitate of silver chloride. The reaction is represented with the equation:
AgNO3(aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)
The equation represents a ________________ reaction.
A) synthesis
B) decomposition
C) neutralization
D) double replacement
Page 2 of 22
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, B
What is the change in oxidation number of bromine in the following re-dox
reaction?
Cl2 + 2HBr → 2HCl + Br2
A) -2; 0
B) -1; 0
C) 0; -1
D) 0; -2
D
When a neutral atom undergoes oxidation, the atom's oxidation number
A) decreases as it gains electrons.
B) decreases as it loses electrons.
C) increases as it gains electrons.
D) increases as it loses electrons.
D
4Fe + 3O2 → 2Fe2O3
Which half-reaction correctly expresses oxidation?
A) O2 → 2O-2 + 4e-
B) O2 + 4e- → 2O2-
Page 3 of 22
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