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Ch.4 - Reactions in Aqueous Solution
Brown - Chemistry: The Central Science 15th Edition
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Tutti i libri di testoBrown 15th EditionCh.4 - Reactions in Aqueous SolutionProblema 45a
Capitolo 4, Problema 45a

True or false: a. If a substance is oxidized, it is gaining electrons.

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1
Understand the concept of oxidation: Oxidation is a chemical process where a substance loses electrons.
Recall the mnemonic 'OIL RIG': Oxidation Is Loss, Reduction Is Gain, which helps remember that oxidation involves the loss of electrons.
Analyze the statement: 'If a substance is oxidized, it is gaining electrons.'
Compare the statement with the definition of oxidation: Since oxidation involves losing electrons, the statement contradicts the definition.
Conclude that the statement is false because a substance that is oxidized loses electrons, not gains them.

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Oxidation and Reduction

Oxidation and reduction are chemical processes that involve the transfer of electrons between substances. Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. These processes are often coupled, meaning that when one substance is oxidized, another is reduced. Understanding these definitions is crucial for analyzing redox reactions.
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Oxidation and Reduction Reactions

Electron Transfer

In redox reactions, the transfer of electrons is fundamental to the changes in oxidation states of the involved species. When a substance is oxidized, it loses electrons, resulting in an increase in its oxidation state. Conversely, the substance that gains these electrons is reduced, leading to a decrease in its oxidation state. This electron transfer is key to understanding the behavior of substances in chemical reactions.
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Electron Geometry

Oxidation States

Oxidation states (or numbers) are a way to keep track of electrons in chemical compounds. They indicate the degree of oxidation of an atom in a molecule and help identify which atoms are oxidized and which are reduced during a reaction. By analyzing oxidation states, one can determine the flow of electrons and the overall redox process, which is essential for answering questions about oxidation and reduction.
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Oxidation Numbers
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