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National Chemistry Olympiad
2013 National Chemistry Olympiad
37
37
Part of
2013 National Chemistry Olympiad
Problems
(1)
2013 USNCO Problem 37: Reduction Potentials
Source:
4/26/2013
Three metals,
A
,
B
A, B
A
,
B
and
C
C
C
, with solutions of their respective cations are tested in a voltaic cell with the following results:
A
A
A
and
B
B
B
:
A
A
A
is the cathode
B
B
B
and
C
C
C
:
C
C
C
is the cathode
A
A
A
and
C
C
C
:
A
A
A
is the anodeWhat is the order of the reduction potentials from highest to lowest for the cations of these metals?
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C
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<span class='latex-bold'>(A)</span>\ A>B>C \qquad<span class='latex-bold'>(B)</span>\ B>C>A\qquad
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C
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A
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C
)
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>
B
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C
{<span class='latex-bold'>(C)</span>\ C>A>B\qquad<span class='latex-bold'>(D</span>}\ B>A>C\qquad
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C