|
|
| Line 1: |
Line 1: |
| [[File:Voltametro a rame.png|thumb|200px|Copper coulometer]]
| | Name: Amie Vigano<br>My age: 38<br>Country: Italy<br>City: Telti <br>Postal code: 7020<br>Address: Via Vipacco 33<br><br>Also visit my web site :: [http://www.beckertalk.com/samantha/?comments=IMG_42658,2014-02-08%FFLeanne%FF Fifa 15 Coin Generator] |
| | |
| The '''copper coulometer''' is a one application for the [[copper-copper(II) sulfate electrode]]. Such a [[coulometry|coulometer]] consists of two identical copper electrodes immersed in slightly acidic [[buffer solution|pH-buffered]] solution of [[copper(II) sulfate]]. Passing of [[current (electricity)|current]] through the element leads to the anodic [[solvation|dissolution]] of the metal on [[anode]] and simultaneous [[deposition (chemistry)|deposition]] of [[copper]] ions on the [[cathode]]. These reactions have 100% efficiency over a wide range of current density.
| |
| | |
| ==Calculation==
| |
| The amount of [[electric charge]] (quantity of electricity) passed through the cell can easily be determined by measuring the change in mass of either electrode and calculating:
| |
| :<math>Q = \frac{2\Delta m F}{63.546}</math>, | |
| where:
| |
| *Q is the quantity of electricity (coulombs)
| |
| *<math>\Delta m</math> is the mass transported (gm)
| |
| *the factor 2 is due to the transport of [[divalent]] ions
| |
| *F is the [[Faraday constant]] (96485.3383 coulombs per mole)
| |
| *63.546 is the [[atomic weight]] of copper (as grams per mole)
| |
| | |
| Although this apparatus is interesting from a theoretical and historical point of view, present-day electronic measurement of time and electrical current provide in their multiplication the amount of passed [[coulomb]]s much easier, with greater precision, and in a shorter period of time than is possible by weighing the electrodes.
| |
| | |
| ==See also==
| |
| *[[Mercury coulometer]]
| |
| *[[Coulometry]]
| |
| | |
| == References ==
| |
| <references/> | |
| {{unreferenced|date=October 2008}}
| |
| | |
| [[Category:Physical chemistry]]
| |
| [[Category:Electroanalytical chemistry devices]]
| |
| [[Category:Copper|Coulometer]]
| |
| [[Category:Coulometers]]
| |
| | |
| {{physical-chemistry-stub}}
| |
Revision as of 17:22, 5 February 2014
Name: Amie Vigano
My age: 38
Country: Italy
City: Telti
Postal code: 7020
Address: Via Vipacco 33
Also visit my web site :: Fifa 15 Coin Generator