Kopercoulometer: verschil tussen versies
Verwijderde inhoud Toegevoegde inhoud
Nieuwe pagina aangemaakt met '<!-- Missing image removed: thumb --> {{wiu2}} De '''kopercoulometer''' is een van de algemene toepassi...' |
Invulling parameters sjabloon met AWB |
||
Regel 1:
<!-- Missing image removed: [[
{{wiu2|2=2009|3=11|4=04}}
De '''kopercoulometer''' is een van de algemene toepassingen van de koper/kopersulfaat elektrode.
<!-- Such a [[coulometry|coulometer]] consists of two identical copper electrodes immersed into the slightly acidic [[buffer solution|pH-buffered]] solution of the [[copper(II) sulfate]]. Passing of the [[current (electricity)|current]] through the element leads to the anodic [[solvation|dissolution]] of the metal on [[anode]] and simultaneous [[Deposition (chemistry)|deposition]] of the [[copper]]-ions on the [[cathode]]. These reactions have 100% efficiency over a wide range of the current densities.
==Calculation==
Amount of the [[quantity of electricity]] passed through the cell can be easily calculated by mass changes of any of the electrodes:
:<math>Q = \frac{ \Delta\ m*2*F}{63.546}</math>,<br />
where:
* Q
* <math>\Delta\ m</math> is the mass transported (gm)
* 63.546 is the [[atomic weight]] of copper (the factor 2 is due to the transport of [[divalent]] ions)
Regel 16:
Although from a theoretical and historical point of view this apparatus is interesting, present day electronic measurement of time and electrical current provide in their multiplication the amount of passed [[coulomb]]s much easier, with greater precission, and in a shorter period of time than is possible by weighing the electrodes.
-->
==Referenties en zie ook ==
* [[Kwikcoulometer]]
* [[Coulometrie]]
<references />
{{Navigatie elektrochemie}}
[[
[[de:Kupfercoulometer]]
| |||
