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Chapter 49: Problem 4

Is a species that has an atom for which there is an increase in oxidation number oxidized or reduced? Is that species the oxidizing agent or the reducing agent?

Short Answer

Expert verified
A species that has an atom for which there is an increase in oxidation number is oxidized. This species acts as a reducing agent.

Step by step solution

01

Identify the oxidation state

The process starts by identifying the oxidation number of atoms in the species. An atom for which there is an increase in oxidation number implies that it has lost electrons in the reaction.
02

Understanding oxidation and reduction

Next is understanding what oxidation and reduction mean. Oxidation occurs when an atom loses electrons and so the oxidation number increases. Therefore, if the oxidation number of an atom in species increases, it can be concluded that the species has been oxidized.
03

Understanding oxidizing and reducing agents

An oxidizing agent oxidizes another substance, thus, accepting electrons and itself is reduced. Conversely, a reducing agent reduces another substance by donating electrons, so it is being oxidized. Therefore, a species with an increased oxidation number is oxidized and it acts as a reducing agent as it has lost electrons during the reaction.

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Most popular questions from this chapter

In which of the following are the oxidation number and the partial charge the same number? \(\mathrm{MgO}: \mathrm{CO}_{2}: \mathrm{NaF}: \mathrm{H}_{2} \mathrm{O}: \mathrm{CCl}_{4}: \mathrm{NiCl}_{2} .\)

Which is the better representation of the actual charge on an atom in a moleculethe formal charge; the partial charge; the oxidation state? Why?

Describe, in grammatically correct English sentences, how one can determine whether or not a reaction is an oxidation-reduction reaction.
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