Which is not true for standard electrode potentials? Please tell me which is the

ID: 506718 • Letter: W

Question

Which is not true for standard electrode potentials? Please tell me which is the right answer and why ?

a. The potential for the standard hydrogen electrode is chosen to be +1.00 V.

b. The half-reactions are written as reductions.

c. Cell constituents are in their standard states.

E° for oxidation is the negative of E° for reduction.

a. The potential for the standard hydrogen electrode is chosen to be +1.00 V.

b. The half-reactions are written as reductions.

c. Cell constituents are in their standard states.

E° for oxidation is the negative of E° for reduction.

wrong answer : E° for oxidation is the negative of E° for reduction

explanation:

1) a. The potential for the standard hydrogen electrode is chosen to be +1.00 V this correct standard hydrogen electode

2) The half-reactions are written as reductions it is correct IUPAC allows only reduction potential values

3) Cell constituents are in their standard states. yes 1 M concentration at 298 K temperature

4) E° value is always reduction potential . we cannot write negative or positive based on whether it is reduction or oxidation .

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