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General Chemistry

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Electrochemistry

Question
9 out of 10
 

image\27460 ch 12 passage 1.png

By comparing standard reduction potentials, we can compare the reduction and oxidation powers of elements or ionic species. Some standard reduction potential values are given in Table 1.


Which of the following species has the highest oxidation potential?

A Cr
B K
C Cu
D Ag
Ans. B The question asks for the species that has the highest oxidation potential. Oxidation is losing electrons. Thus all the half reactions should be considered in the oxidation sense. Since the table gives you reduction half-reactions, you have to reverse all the equations, and when you reverse the equations the sign of the potentials should also be reversed. The most positive value is that of the oxidation of potassium.

image\Solutions ch 12, Q 9.png

Electrochemistry Flashcard List

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