1 / 39

Understanding Faraday's Constant and the Nernst Equation in Electrochemistry

This piece explores the foundational concepts in electrochemistry, focusing on Faraday's constant, electric current, Ohm's law, and the Nernst equation. It details how potential differences in electrochemical cells relate to charge and resistance, defining key terms like work and energy in the context of electrochemical reactions. The article also discusses how ion-selective electrodes are utilized in understanding blood tests like the CHEM-7 panel, emphasizing the significance of thermodynamics and equilibrium in chemical processes.

kenyon-hines
Télécharger la présentation

Understanding Faraday's Constant and the Nernst Equation in Electrochemistry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Elechtrochemistry 17

  2. How much? – Faraday’s constant. F = (6.022 x 1023 mol-1)x (1.602192 x 10-19 C) = 96,484 C mol-1

  3. Faraday

  4. Electricity Current = Charge/time - I = Q/t [Ampere]=[Coulomb]/[sec] Potential = Current x Resistance - E = I R (Ohms law) [Volt]=[Ampere] [Ohm]

  5. So what is resistance? NB: Potential is relative!

  6. Work = Potential x Charge - W = E q [Joule] = [Volt] [Coulomb]

  7. NERNST EQUATION

  8. NERNST EQUATION At 25 oC

  9. NERNST EQUATION Walther Hermann Nernst 1864–1941

  10. NERNST EQUATION

  11. NERNST EQUATION

  12. THERMODYNAMICS and equilibrium

  13. THERMODYNAMICS and equilibrium

  14. NERNST EQUATION

  15. 0.50 M AgNO3(aq) 0.010 M Cd(NO3)2(aq)

  16. 0.50 M AgNO3(aq) 0.010 M Cd(NO3)2(aq)

  17. 0.50 M AgNO3(aq) 0.010 M Cd(NO3)2(aq) My way:

  18. Ion selective electrode

  19. Ion selective electrode

  20. Ion selective electrode

  21. Ion selective electrode

  22. Ion selective electrode

  23. Ion selective electrode

  24. Ion selective electrode

  25. Ion selective electrode CHEM-7 is a group of blood tests that provides information about your body's metabolism. The test is commonly called a basic metabolic panel. BUN: 7 to 20 mg/dL CO2 (carbon dioxide): 20 to 29 mmol/L Creatinine: 0.8 to 1.4 mg/dL Glucose: 64 to 128 mg/dL Serum chloride: 101 to 111 mmol/L Serum potassium: 3.7 to 5.2 mEq/L Serum sodium: 136 to 144 mEq/L

  26. Ion selective electrode Selectivity And interference

  27. NERNST EQUATION Measure E to determine 1 unknown concentration (…..so fix the other concentrations)

  28. Reference electrodes

  29. Reference electrodes My way:

  30. Reference electrodes

More Related