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15
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Which of the following statements is FALSE?
Oxidation occurs at the anode.
All voltaic (galvanic) cells involve the use of electricity
Reduction occurs at the cathode.
Oxidation and reduction half-reactions occur at electrodes i
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15
×
T/F pH electrodes sensitivity to H+ is not based on Redox reactions
True
False
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15
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In the standard notation for a voltaic cell, the double vertical line "||" represents:
a salt bridge
a phase boundary
a standard hydrogen electrode
gas electrode
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15
×
In voltaic cells, such as those diagrammed in your text, the salt bridge _______ .
acts as a mechanism to allow mechanical mixing of the soluti
allows charge balance to be maintained in the cell
is tightly plugged with firm agar gel through which ions can
is not necessary in order for the cell to work
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15
×
T/F - Ion selective electrodes are unaffected by color or turbidity of the solution
False
True
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15
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The half-reaction that occurs at the anode during the electrolysis of molten sodium bromide is:
2 H2O <===> 2 OH- + H2
Br2 + 2 e-<===> 2 Br-
Na <===> Na+ + e-
2 Br- <===>Br2 + 2 e-
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15
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Which one of the following is the strongest reducing agent
Br-
Cl-
F-
I-
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15
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Which of the following is not the characteristic of ion selective electrodes
inexpensive
Narrow concentration range
Operates in a wide range of temperatures
Simple to use
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