Register to reply

Oxidation of Metal Using a Generator

by Conservation
Tags: generator, metal, oxidation
Share this thread:
Conservation
#1
Jun22-14, 11:13 AM
Conservation's Avatar
P: 31
Hi all, this question may sound incredibly obvious to a degree of trolling, but I was having difficulty finding an online source that dealt with this subject.

When one connects a metallic plate to, say, a positive end of a voltage source, is the metal actually oxidizing and changing to +1, +2, etc. charge, in a similar manner that you would see in a chemical reaction?

Thanks.
Phys.Org News Partner Chemistry news on Phys.org
Scientists develop 'electronic nose' for rapid detection of C. diff infection
A new synthetic amino acid for an emerging class of drugs
Team pioneers strategy for creating new materials
DrDu
#2
Jun22-14, 12:07 PM
Sci Advisor
P: 3,593
In some sense yes, however, the charge per metal atom is infinitesimally small.
Conservation
#3
Jun22-14, 09:38 PM
Conservation's Avatar
P: 31
Thanks for answering the question. May I ask whether this process of "forced" oxidation or reduction is ever used in a lab setting for chemistry to control the oxidation state, or is it not viable due to the sheer amount of emf required to displace the electrons?

DrDu
#4
Jun23-14, 12:55 AM
Sci Advisor
P: 3,593
Oxidation of Metal Using a Generator

Somehow, this is the basic principle underlying electrochemistry.
Conservation
#5
Jun23-14, 07:41 PM
Conservation's Avatar
P: 31
Derp. Apologies for obliviousness; the idea didn't occur to me at that moment.
In a different but similar question, when a metal is oxidized, what prevents the positively charged metallic ions from completely repelling each other and falling apart all at once during something like reverse electroplating? Wouldn't the metallic bonds between the metal atoms be greatly weakened or reduced to zero once the metal is oxidized completely?
DrDu
#6
Jun24-14, 01:14 AM
Sci Advisor
P: 3,593
As I said before, the charges accumulating on a metal plate are very small compared to the number of charge carriers in a metal, and, the charges are localized on the surface of the plate. Hence they have practically no effect on cohesion in the metal. However, on the surface, the fields may become high and lead to ionization (field ionization). A process similar to what you have in mind is electrospray ionization
http://en.wikipedia.org/wiki/Electrospray_ionization


Register to reply

Related Discussions
Finding the oxidation state of transition metal in complex compounds Chemistry 0
Transition metal oxidation states Chemistry 1
Would metal hitting metal or metal hitting glass make more noise? General Discussion 3
Preventing Oxidation of Gallium in Metal Alloy Chemistry 2
Oxidation proof metal mesh? Chemistry 2