Half-Reactions: Find Strongest Oxidizing Agent

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In summary, the conversation discusses the strongest oxidizing agent based on the given half-reactions table. There is a disagreement about whether F- or Cd2+ is the correct answer, with one person arguing that F- should be considered an oxidizing agent while the other argues for Cd2+. Ultimately, it is clarified that F/F2 is the oxidizing agent while F- is the reducing agent, making Cd2+ the correct answer.
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brake4country
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Homework Statement


Based only on the half-reactions in the table, which of the following is the strongest oxidizing agent?
(See attachment)

Homework Equations

The Attempt at a Solution


I noticed in this table that not all elements are in the reduction form. I flipped them around and changed the sign, however, the correct answer states that Cd2+ is the correct answer. Shouldn't it be F-? Thanks in advance.
 

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  • #2
brake4country said:
F-?
... an oxidizing agent?
 
  • #3
Bystander said:
... an oxidizing agent?
Ok, I typed that wrong. According to the chart, we know that the the half reaction: 2F-→F2 + 2e- has potential of -2.87 V. But this is being oxidized. Don't we have to flip it and change it to the reduction half reaction to compare it to the rest of the agents listed?
 
  • #4
No. F/F2 is an oxidizing agent; F- is a reducing agent.
 
  • #5
Right, so wouldn't so wouldn't 2F-→F2+ 2e- be the strongest oxidizing agent and not Cd2++2e-→Cd? I think the book is wrong in this one.
 
  • #6
NO. The half reactions are written with both species; you are not being asked to pick a half reaction, just a single species.
 

Related to Half-Reactions: Find Strongest Oxidizing Agent

1. What is a half-reaction?

A half-reaction is a part of a chemical reaction that involves either the loss or gain of electrons by a specific element or compound. It is used to show the individual steps of a redox reaction.

2. What is the purpose of finding the strongest oxidizing agent in a half-reaction?

The purpose of finding the strongest oxidizing agent is to determine which element or compound is the most efficient at accepting electrons and causing oxidation. This information is important in understanding the overall redox reaction and predicting its outcome.

3. How do you find the strongest oxidizing agent in a half-reaction?

To find the strongest oxidizing agent, you must first balance the half-reaction by adding electrons to one side to balance the charge. Then, compare the standard reduction potentials of the elements or compounds involved. The one with the highest positive standard reduction potential is the strongest oxidizing agent.

4. What factors affect the strength of an oxidizing agent in a half-reaction?

The strength of an oxidizing agent in a half-reaction depends on its electronegativity, ionization energy, and electron affinity. The higher these values are, the stronger the oxidizing agent will be.

5. How does the strength of an oxidizing agent affect the overall redox reaction?

The strength of an oxidizing agent determines how easily it can accept electrons and cause oxidation. A stronger oxidizing agent will be able to more easily pull electrons away from other elements, resulting in a more vigorous reaction.

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