Embark on a journey of knowledge! Take the quiz and earn valuable credits.
Challenge yourself and boost your learning! Start the quiz now to earn credits.
Unlock your potential! Begin the quiz, answer questions, and accumulate credits along the way.
What is Standard Hydrogen Electrode mean?
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 electroreactions, hydrogen's standard electrode potential (E°) is declared to be zero volts at any temperature. 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:
2 H+(aq) + 2 e− → 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 (100 kPa) and the activity coefficient 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 usually lower for more concentrated solutions. The Nernst equation should be written as:
E = R T F ln a H + p H 2 / p 0 {\displaystyle E={RT \over F}\ln {\frac {a_{\mathrm {H^{+}} }}{\sqrt {p_{\mathrm {H_{2}} }/p^{0}}}}} E = − 2.303 R T F p H − R T 2 F ln p H 2 p< referenceFull Form | Category |
---|---|
Standard Hydrogen Electrode | Academic & Science |
Société d'Études Historiques | Academic & Science |
Society for Historical Studies | Academic & Science |
Significant Human Experience | Academic & Science |
Shenyang | Airport Code |
Safety, Health, and Environment | Business |
Stonehenge Metals, LTD. | Business |
Safe, Healthy, and Empowered | Community |
Scottish Higher Education | Community |
Société des Études Historiques | Community |
Sisterhood Helping Empowerment | Community |
Sector Head for the Exposed Source | Computing |
ShineChain | Cryptocurrency |
System Hazard Evaluation | General |
Selina Hebe Ella | General |
Search Human Equalizer | General |
Shadow es | General |
Solar Household Energy | Governmental |
SEORAPHULI | Indian Railway Station |
Sustainable Health Enterprises | Medical |
Shenyang, Mainland China | Regional |
Schools for Health in Europe | Regional |
Supercritical Helium | Space Science |
Posted on 20 Sep 2024, this text provides information on Miscellaneous in Academic & Science related to Academic & Science. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
Turn Your Knowledge into Earnings.
Ever curious about what that abbreviation stands for? fullforms has got them all listed out for you to explore. Simply,Choose a subject/topic and get started on a self-paced learning journey in a world of fullforms.
Write Your Comments or Explanations to Help Others