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    Reduction Potential

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    Observations:
    1) A reacts spontaneously with 1mol/L BNO3, 1mol/L D(NO3)2 and dilute sulfuric acid.A does not react with 1mol/L C(NO3)2.
    2) B does not react with any of the 1mol/L solutions above or the dilute sulfuric acid.
    3) C reacts spontaneously with dilute sulfuric acid and with 1mol/L solutions of all the other metallic salts.
    4) D reacts spontaneously with 1mol/L BNO3. It does not react with the dilute sulfuric acid.

    a) Use these observations and arrange the following five reduction half-cell reactions in order, from the one with the largest positive reduction potential listed first:

    A^(2+)+2e->A(s)
    B^(+)+e->B(s)
    C^(2+)+2e->C(s)
    D^(2+)+2e->D(s)
    2H(+)+2e->H2(g)

    b) Which metal is the best reducing agent and which ion is the best oxidizing agent? Is the dilute sulfuric acid the salt bridge?

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    Solution Preview

    a) Use these observations and arrange the following five reduction half-cell reactions in order, from the one with the largest positive reduction potential listed first

    A^(2+)+2e->A(s) (4)
    B^(+)+e->B(s) (1)
    C^(2+)+2e->C(s) (5)
    D^(2+)+2e->D(s) ...

    Solution Summary

    This solution provides answers only for (a) and an explanation for (b).

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