Question 1
Oxidation/Reduction reactions occur when one element gains electrons and another element loses electrons.
True
False
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Question 2
You can't have oxidation without reduction.
True
False
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Question 3
Ions don't have to be formed in oxidation/reduction reactions.
True
False
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Question 4
The oxidation number is the charge an atom would have if the substance was completely ionic.
True
False
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Question 5
Everything is ionic.
True
False
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Question 6
We can get the oxidation number by assuming that the electrons will be transferred to the element with the strongest attraction for electrons.
True
False
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Question 7
The element with the strongest attraction for electrons is
Hydrogen, H
Carbon, C
Argon, Ar
Flourine, F
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Question 8
Which of the following items is not one of the rules for determining oxidation numbers?
Elements in their normal state are zero.
Single atom ions are the charge on the ion.
Single atom ions are assigned zero.
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Question 9
Which of the following items is not one of the rules for determining oxidation numbers?
Hydrogen is assumed to be +1.
The sum of the oxidation numbers is always zero.
The sum of the oxidation numbers in a molecule must add to the charge of the molecule.
None of the above.
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Question 10
When the oxidation number goes down from reactant to product the element is reduced.
True
False
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Question 11
Elements that are reduced
gain electrons.
Lose electrons
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Question 12
Elements that are oxidized
gain electrons.
lose electrons.
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Question 13
Give the oxidation number for each element on the reactant side of the equation:
Cu(s) + 2Ag+(aq) + 2NO3-(aq) → Cu(NO3)2(aq) + 2Ag(s)
List them in the order of Cu, Ag, N, and O.
1, 1, 3, -1
0, 1, 5, -2
1, 2, 5, 0
0, 1, 6, -2
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Question 14
Give the oxidation number for each element on the product side of the equation:
Cu(s) + 2AgNO3(aq) → Cu2+(aq) + 2NO3-(aq) + 2Ag(s)
List them in the order of Cu, Ag, N, and O.
1, 0, 5, -2
1, 1, 6, -2
2, 0, 5, -2
2, 1, 6, -2
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Question 15
In the following reaction ____ is oxidized.
Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)
Cu
Ag
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Question 16
In the following reaction ____ is reduced.
Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)
Cu
Ag
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