Timeline for Why does the Nernstian cell potential remain ideally constant during charge or discharge of an electrochemical cell?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Nov 6, 2023 at 20:27 | comment | added | Mäßige | Of course the cell potential changes while charging/discharging; the bulk cell electrolyte concentrations change and the reaction quotient in the logarithm changes until it reaches the equilibrium constant K, where the cell potential drops until zero. | |
| Nov 6, 2023 at 19:04 | history | edited | ananta | CC BY-SA 4.0 |
incorporated suggestions in comments
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| Nov 6, 2023 at 17:59 | comment | added | ananta | Let us continue this discussion in chat. | |
| Nov 6, 2023 at 17:50 | comment | added | ananta | @AChem but the OP has specifically asked for the potential measurement during charging and discharging, not when there is zero current. Although not being an experimental chemist, I may be wrong about the method of measurement, there is no doubt that changing the reaction quotient when charging or discharging changes the cell potential. | |
| Nov 6, 2023 at 17:35 | comment | added | ACR | Check any university level physical chemistry textbook or Wikipedia. Search the terms conductivity measurements and potentiometry. In potentiometry the "potential" is measured with zero current drawn. Conductivity exclusively uses AC. | |
| Nov 6, 2023 at 17:30 | comment | added | ananta | @AChem please find a source to support your statement. Meanwhile, I will do the same. | |
| Nov 6, 2023 at 17:28 | comment | added | ACR | No ananta. I think there is a misconception here. AC current is not used to measure cell potentials. You are confusing cell potential with conductivity measurements. The latter is indeed dependent on high frequency AC for the reasons you suggest above. | |
| Nov 6, 2023 at 17:27 | comment | added | ananta | @Achem AC current allows for the measurement of cell potential without changing the electrolytic concentrations because the reversal of current also reverses the chemical reactions that occur, preserving the reaction quotient. | |
| Nov 6, 2023 at 17:24 | comment | added | ACR | Nernst equation has nothing to do with AC or DC current. | |
| Nov 6, 2023 at 16:59 | history | answered | ananta | CC BY-SA 4.0 |