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- Standard_hydrogen_electrode abstract "The standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential (E0) is declared to be zero at all temperatures. Potentials of any other electrodes are compared with that of the standard hydrogen electrode at the same temperature.Hydrogen electrode is based on the redox half cell:2H+(aq) + 2e- → H2(g)This redox reaction occurs at a platinized platinum electrode.The electrode is dipped in an acidic solution and pure hydrogen gas is bubbled through it. The concentration of both the reduced form and oxidised form is maintained at unity. That implies that the pressure of hydrogen gas is 1 bar and the activity of hydrogen ions in the solution is unity. The activity of hydrogen ions is their effective concentration, which is equal to the formal concentration times the activity coefficient. These unit-less activity coefficients are close to 1.00 for very dilute water solutions, but are usually lower for more concentrated solutions. The Nernst equation should be written as:orwhere: aH+ is the activity of the hydrogen ions, aH+=fH+ CH+ /C0 pH2 is the partial pressure of the hydrogen gas, in pascals, Pa R is the universal gas constant T is the temperature, in kelvins F is the Faraday constant (the charge per a mole of electrons), equal to 9.6485309*104 C mol−1 p0 is the standard pressure 105 in Pa↑".
- Standard_hydrogen_electrode wikiPageID "578150".
- Standard_hydrogen_electrode wikiPageRevisionID "596323860".
- Standard_hydrogen_electrode hasPhotoCollection Standard_hydrogen_electrode.
- Standard_hydrogen_electrode subject Category:Electrodes.
- Standard_hydrogen_electrode subject Category:Hydrogen_technologies.
- Standard_hydrogen_electrode type Artifact100021939.
- Standard_hydrogen_electrode type Conductor103088707.
- Standard_hydrogen_electrode type Device103183080.
- Standard_hydrogen_electrode type Electrode103274796.
- Standard_hydrogen_electrode type Electrodes.
- Standard_hydrogen_electrode type Instrumentality103575240.
- Standard_hydrogen_electrode type Object100002684.
- Standard_hydrogen_electrode type PhysicalEntity100001930.
- Standard_hydrogen_electrode type Whole100003553.
- Standard_hydrogen_electrode comment "The standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential (E0) is declared to be zero at all temperatures.".
- Standard_hydrogen_electrode label "Electrodo estándar de hidrógeno".
- Standard_hydrogen_electrode label "Elektroda wodorowa".
- Standard_hydrogen_electrode label "Elettrodo standard a idrogeno".
- Standard_hydrogen_electrode label "Standaard-waterstofelektrode".
- Standard_hydrogen_electrode label "Standard hydrogen electrode".
- Standard_hydrogen_electrode label "Wasserstoffelektrode".
- Standard_hydrogen_electrode label "Électrode standard à hydrogène".
- Standard_hydrogen_electrode label "Водородный электрод".
- Standard_hydrogen_electrode label "قطب قياسي للهيدروجين".
- Standard_hydrogen_electrode sameAs Wasserstoffelektrode.
- Standard_hydrogen_electrode sameAs Electrodo_estándar_de_hidrógeno.
- Standard_hydrogen_electrode sameAs Électrode_standard_à_hydrogène.
- Standard_hydrogen_electrode sameAs Elettrodo_standard_a_idrogeno.
- Standard_hydrogen_electrode sameAs Standaard-waterstofelektrode.
- Standard_hydrogen_electrode sameAs Elektroda_wodorowa.
- Standard_hydrogen_electrode sameAs m.02rxzf.
- Standard_hydrogen_electrode sameAs Q898559.
- Standard_hydrogen_electrode sameAs Q898559.
- Standard_hydrogen_electrode sameAs Standard_hydrogen_electrode.
- Standard_hydrogen_electrode wasDerivedFrom Standard_hydrogen_electrode?oldid=596323860.
- Standard_hydrogen_electrode isPrimaryTopicOf Standard_hydrogen_electrode.