Search results
Results From The WOW.Com Content Network
This gives the SCE a potential of +0.248 V vs. SHE at 20 °C and +0.244 V vs. SHE at 25 °C, [1] but slightly higher when the chloride solution is less than saturated. For example, a 3.5M KCl electrolyte solution has an increased reference potential of +0.250 V vs. SHE at 25°C while a 1 M solution has a +0.283 V potential at the same temperature.
While the SHE might seem to be a reasonable reference for nonaqueous work as it turns out the platinum is rapidly poisoned by many solvents including acetonitrile [3] causing uncontrolled drifts in potential. Both the SCE and saturated Ag/AgCl are aqueous electrodes based around saturated aqueous solution.
The data below tabulates standard electrode potentials (E°), in volts relative to the standard hydrogen electrode (SHE), at: Temperature 298.15 K (25.00 °C; 77.00 °F); Effective concentration (activity) 1 mol/L for each aqueous or amalgamated (mercury-alloyed) species; Unit activity for each solvent and pure solid or liquid species; and
The city appealed and, on Dec. 17, 1956, the U.S. Supreme Court rejected the appeal to hear Browder vs. Gayle, citing the already established precedent of Flemming vs. SCE&G.
During the early development of electrochemistry, researchers used the normal hydrogen electrode as their standard for zero potential. This was convenient because it could actually be constructed by "[immersing] a platinum electrode into a solution of 1 N strong acid and [bubbling] hydrogen gas through the solution at about 1 atm pressure".
On Dec. 9, she and her sister Venus Williams enjoyed a fun trip to Disney World, where they posed for photos in front of Cinderella Castle at Magic Kingdom and various rides at the park.
The head of Southern California Edison said Wednesday that winds blowing in Eaton Canyon on Jan. 7 were not strong enough to merit de-energizing a powerful electrical transmission line that is now ...
The absolute potential of the SHE is 4.44 ± 0.02 V at 25 °C. Therefore, for any electrode at 25 °C: = + where: E is electrode potential V is the unit volt M denotes the electrode made of metal M (abs) denotes the absolute potential