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14 December, 04:54

A certain half-reaction has a standard reduction potential E0red = + 0.13V. An engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least 1.10V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer requires this half-reaction to happen at the anode of the cell.

Required:

a. Is there a minimum standard reduction potential that the half-reaction used at the cathode of this cell can have?

b. Is there a maximum standard reduction potential that the half-reaction used at the cathode of this cell can have?

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  1. 14 December, 05:15
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    a. 1.23 V

    b. No maximum

    Explanation:

    Required:

    a. Is there a minimum standard reduction potential that the half-reaction used at the cathode of this cell can have?

    b. Is there a maximum standard reduction potential that the half-reaction used at the cathode of this cell can have?

    The standard cell potential (E°cell) is the difference between the standard reduction potential of the cathode and the standard reduction potential of the anode.

    E°cell = E°red, cat - E°red, an

    If E°cell must be at least 1.10 V (E°cell > 1.10 V),

    E°red, cat - E°red, an > 1.10 V

    E°red, cat - 0.13V > 1.10 V

    E°red, cat > 1.23 V

    The minimum standard reduction potential is 1.23 V while there is no maximum standard reduction potential.
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