redox reactions
Electron exchange processes
Redox reactions are chemical reactions involving the transfer of electrons between substances.
One substance loses electrons (oxidation) while another gains them (reduction)—the two processes always occur together.
The term combines "reduction" and "oxidation." Redox reactions power batteries, cause rust, and drive cellular respiration: Photosynthesis is a redox reaction that converts light energy into chemical energy.
Iron oxide coating
- rustingMetal oxidation process
- tarnishOxidation discoloration on metal
- pittingForming small cavities
- galvanic corrosionElectrochemical damage between unlike metals
anodic · weathering · electrochemical · protective coating · sacrificial anode · iron oxide · patina · verdigris
Conductive interface point
- anodeOxidation electrode
- cathodeElectrode current exits through
- electrolysisCurrent-induced ionic separation
- batteryPortable electricity storage
half-reaction · electron flow · electrolyte · electroplating · fuel cell · voltage · current · Faraday
Cell-level fuel burning
- glycolysisGlucose metabolism producing ATP
- citric acid cycleAerobic respiration's central pathway
- ATPCell's energy molecule
- mitochondriaCell's energy-producing organelles
NADH · aerobic respiration · anaerobic respiration · fermentation · photosynthesis · coenzymes · oxygen consumption · catabolism
Electron-accepting chemical species
- electron acceptorSpecies gaining electrons
- half-reactionElectron gain or loss alone
- balanced equationFormula with conserved atoms
- stoichiometryQuantitative chemical reaction analysis
Burning gas made visible
- burningCombustion in progress
- fireCombustion with flames
- ignitionStarting combustion process
- fuelEnergy source material
oxygen · exothermic · heat · carbon dioxide · water vapor · hydrocarbon · incomplete combustion · smoke
rust
Iron oxide coating
galvanic corrosion · anodic · weathering · electrochemical · protective coating · sacrificial anode · iron oxide · patina · verdigris · prevention
electrode
Conductive interface point
- anodeOxidation electrode
- cathodeElectrode current exits through
- electrolysisCurrent-induced ionic separation
battery · half-reaction · electron flow · electrolyte · electroplating · fuel cell · voltage · current · Faraday · electrolytic cell
cellular respiration
Cell-level fuel burning
- glycolysisGlucose metabolism producing ATP
- citric acid cycleAerobic respiration's central pathway
- ATPCell's energy molecule
mitochondria · NADH · aerobic respiration · anaerobic respiration · fermentation · photosynthesis · coenzymes · oxygen consumption · catabolism · cytochrome
oxidizing agent
Electron-accepting chemical species
- electron acceptorSpecies gaining electrons
- half-reactionElectron gain or loss alone
- balanced equationFormula with conserved atoms
flame
Burning gas made visible
fuel · oxygen · exothermic · heat · carbon dioxide · water vapor · hydrocarbon · incomplete combustion · smoke · ash