electrochemical series 6.45

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electrochemical series 6.45

Postby 705121606 » Thu Feb 27, 2020 3:22 pm

We are given a list of metals and asked to order them starting with the most strongly reducing metal. I looked up the standard values in the appendix and this list was from most negative to most positive. Since these values correlate to the reduction potentials, why does a more negative value parallel to the most strongly reduced? I thought it meant that the more positive it is the greater the reduction potential. Is the question asking which is more strongly reduced or which is the strongest reducing agent?

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Re: electrochemical series 6.45

Postby 805303639 » Thu Feb 27, 2020 8:03 pm

The question asks you to order the metals starting with the most strongly reducing metal. The "most strongly reducing metal" is the strongest reducing agent, which is the metal half-reaction with the most negative E^0 value (in this question, Al). You are right that the more positive the E^0, the greater the reduction potential for a metal. Reduction potential refers to the metal's propensity to be reduced, not its strength as a reducing agent. Species that are strongly reducing (large negative E^0) are likely to get oxidized in a redox reaction.

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