QuestionJuly 22, 2025

Question 9 of 25 How can one determine that a redox reaction will be nonspontaneous? A. The reduction potential has a positive value. B. The reduction potential plus oxidation potential is negative. C. The reduction potential plus oxidation potential is positive. D. The oxidation potential has a negative value.

Question 9 of 25 How can one determine that a redox reaction will be nonspontaneous? A. The reduction potential has a positive value. B. The reduction potential plus oxidation potential is negative. C. The reduction potential plus oxidation potential is positive. D. The oxidation potential has a negative value.
Question 9 of 25
How can one determine that a redox reaction will be nonspontaneous?
A. The reduction potential has a positive value.
B. The reduction potential plus oxidation potential is negative.
C. The reduction potential plus oxidation potential is positive.
D. The oxidation potential has a negative value.

Solution
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Answer

B. The reduction potential plus oxidation potential is negative. Explanation 1. Understand Redox Reaction Spontaneity A redox reaction is nonspontaneous if the overall cell potential (E_{cell}) is negative. 2. Calculate E_{cell} E_{cell} = E_{reduction} + E_{oxidation}. For nonspontaneity, E_{cell} must be negative. 3. Analyze Options B states that the reduction potential plus oxidation potential is negative, which matches the condition for a nonspontaneous reaction.

Explanation

1. Understand Redox Reaction Spontaneity<br /> A redox reaction is nonspontaneous if the overall cell potential ($E_{cell}$) is negative.<br /><br />2. Calculate $E_{cell}$<br /> $E_{cell} = E_{reduction} + E_{oxidation}$. For nonspontaneity, $E_{cell}$ must be negative.<br /><br />3. Analyze Options<br /> B states that the reduction potential plus oxidation potential is negative, which matches the condition for a nonspontaneous reaction.
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