digplanet beta 1: Athena
Share digplanet:

Agriculture

Applied sciences

Arts

Belief

Business

Chronology

Culture

Education

Environment

Geography

Health

History

Humanities

Language

Law

Life

Mathematics

Nature

People

Politics

Science

Society

Technology

Copper coulometer

The copper coulometer is a one application for the copper-copper(II) sulfate electrode. Such a coulometer consists of two identical copper electrodes immersed in slightly acidic pH-buffered solution of copper(II) sulfate. Passing of current through the element leads to the anodic dissolution of the metal on anode and simultaneous deposition of copper ions on the cathode. These reactions have 100% efficiency over a wide range of current density.

Calculation[edit]

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:

Q = \frac{2\Delta m F}{63.546},

where:

  • Q is the quantity of electricity (coulombs)
  • \Delta m 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 coulombs much easier, with greater precision, and in a shorter period of time than is possible by weighing the electrodes.

See also[edit]

References[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Copper_coulometer — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
3 videos found

AP chemistry frq #10 electrochemistry Coulometry

Electrochemistry is covered looking at voltage of cells, coulometry calculations and comparing thermodynamics with electrochemistry. Problem can be found her...

Faraday's Second Law of Electrolysis

Check out us at:http://chemistry.tutorvista.com/physical-chemistry/electrolysis.html Faraday's Second Law of Electrolysis The amounts of different substances...

Making a striped penny - great alternative to penny lab

Show your teacher this, very fun and great products. Use a battery to plate zinc onto a penny. This allows you to coat half in zinc and half in brass for a s...

 
3 videos found

We're sorry, but there's no news about "Copper coulometer" right now.

Loading

Oops, we seem to be having trouble contacting Twitter

Talk About Copper coulometer

You can talk about Copper coulometer with people all over the world in our discussions.

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!