Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

368
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
368
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

612
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...
612
Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

514
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
514
Balancing Redox Equations02:58

Balancing Redox Equations

53.0K
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...
53.0K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

65.5K
Oxidation–Reduction Reactions
65.5K
Standard Electrode Potentials03:02

Standard Electrode Potentials

44.8K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
44.8K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Cation Site Occupancy in Natural Ferroan Double Carbonates via Mössbauer and Fe K-Edge X-ray Absorption Spectroscopy.

Inorganic chemistry·2026
Same author

Water Quality of U.S. Drinking Water Kiosks: Lead Release from "Lead-free" Plumbing after Reverse Osmosis Treatment.

Environmental science & technology·2026
Same author

Heterogeneous reactions control Cr(VI) release and sequestration in complex chemical mixtures of Cr, Fe, Cu, and organics.

Environmental science. Processes & impacts·2025
Same author

Taffit: An Excel Tool for Fitting Tafel Data.

ACS measurement science au·2025
Same author

Dichloroethene reduction by Fe(II): role of transient Fe(II) phases.

Environmental science. Processes & impacts·2025
Same author

Effect of Impurities on the Redox Properties of Goethite.

Environmental science & technology·2025

Related Experiment Video

Updated: Aug 20, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.1K

Redox Potentials of Magnetite Suspensions under Reducing Conditions.

Thomas C Robinson1, Drew E Latta1, Johna Leddy2

  • 1Department of Civil and Environmental Engineering, University of Iowa, Iowa City, Iowa52242, United States.

Environmental Science & Technology
|November 17, 2022
PubMed
Summary
This summary is machine-generated.

Predicting magnetite redox behavior is difficult. This study shows the maghemite/aqueous Fe(II) couple accurately predicts magnetite redox behavior in soils and sediments under specific conditions.

Keywords:
contaminant reductionelectron transferiron oxidemaghemitemagnetiteredox potential

More Related Videos

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.3K
EPR Monitored Redox Titration of the Cofactors of Saccharomyces cerevisiae Nar1
06:01

EPR Monitored Redox Titration of the Cofactors of Saccharomyces cerevisiae Nar1

Published on: November 26, 2014

13.6K

Related Experiment Videos

Last Updated: Aug 20, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.1K
Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.3K
EPR Monitored Redox Titration of the Cofactors of Saccharomyces cerevisiae Nar1
06:01

EPR Monitored Redox Titration of the Cofactors of Saccharomyces cerevisiae Nar1

Published on: November 26, 2014

13.6K

Area of Science:

  • Geochemistry
  • Environmental Science
  • Electrochemistry

Background:

  • Predicting the redox behavior of magnetite in soils and sediments is challenging due to disagreements in measured potentials and relevant Fe(III)|Fe(II) equilibria.
  • Understanding these redox processes is crucial for various environmental applications, including contaminant transport and biogeochemical cycling.

Purpose of the Study:

  • To investigate and clarify the dominant Fe(III)|Fe(II) couples governing the redox potential of stoichiometric magnetite under varying solution conditions.
  • To establish a predictive model for magnetite's redox behavior in reducing environments.

Main Methods:

  • Measured open-circuit potentials of stoichiometric magnetite equilibrated across a range of solution conditions.
  • Analyzed Nernstian behavior and potential shifts at different pH values and aqueous Fe(II) concentrations.
  • Utilized existing Mössbauer spectroscopy and kinetic data for comprehensive analysis.

Main Results:

  • Observed Nernstian behavior under conditions limiting ferrous hydroxide precipitation, with specific slopes for E_H vs pH and E_H vs Fe(II)_aq.
  • Estimated E_H° for magnetite closely matches that of the maghemite/aqueous Fe(II) couple, suggesting its dominant role.
  • Identified a shift in dominant couples at higher pH, indicating a change in redox-poising species.

Conclusions:

  • The maghemite/aqueous Fe(II) couple accurately predicts the redox behavior of stoichiometric magnetite suspensions in the presence of aqueous Fe(II) between pH 6.5 and 8.5.
  • A theoretical Nernst equation derived from this couple can be applied to predict magnetite redox behavior under specific environmental conditions.