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