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Related Concept Videos

Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Redox Equilibria: Overview01:23

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
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In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
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Elephants in the Room, Part 1: Protons in Redox Reactions.

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Summary
This summary is machine-generated.

Many chemical reactions involve both electron and proton transfers, a common phenomenon in oxidation-reduction processes. This study explains the origins and energetic principles behind these coupled transfers.

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Area of Science:

  • Chemistry
  • Biochemistry
  • Physical Chemistry

Background:

  • Oxidation-reduction (redox) reactions are fundamental in chemistry and biology.
  • These reactions often involve the transfer of both electrons and protons.
  • Understanding the interplay between electron and proton transfer is crucial for various chemical processes.

Purpose of the Study:

  • To elucidate the mechanisms driving coupled electron and proton transfer in redox reactions.
  • To provide a framework for understanding the energetics of these combined transfers.
  • To explain the origins of simultaneous electron and proton transfer phenomena.

Main Methods:

  • Theoretical analysis of redox reaction pathways.
  • Thermodynamic modeling of electron and proton transfer energetics.
  • Examination of reaction mechanisms involving proton-coupled electron transfer (PCET).

Main Results:

  • Demonstration of how electron and proton transfers are intrinsically linked in many redox systems.
  • Development of models to predict and understand the energy changes associated with coupled transfers.
  • Identification of key factors influencing the simultaneous transfer of electrons and protons.

Conclusions:

  • Coupled electron and proton transfer is a prevalent and mechanistically significant aspect of redox chemistry.
  • The energetics of these reactions can be systematically understood through theoretical and thermodynamic approaches.
  • This work provides insights into fundamental chemical transformations relevant to catalysis, energy conversion, and biological processes.