RedOx question

  • #1
somasimple
Gold Member
756
5
Hi,

In electro-chemical cells (galvanic, concentration, etc) or more generally when some RedOx reactions occur in solutes, is there always a phase change?
I mean is there always a change in the state of matter from liquid to solid or gas?
 

Answers and Replies

  • #2
Borek
Mentor
28,635
3,106
No.

Pt|Fe2+(aq),Fe3+(aq)||Ce4+(aq),Ce3+(aq)|Pt

(I haven't used cell notation in ages, chances are I did some mistake, but you should get the idea).
 
  • #3
somasimple
Gold Member
756
5
May we say that the use of Platinum is certainly a special case?
Can I rephrase my sentence like that?
In electro-chemical cells (galvanic, concentration, etc) or more generally when some RedOx reactions occur in solutes containing the ionic form of the metal that made the electrode, is there always a phase change?
I mean is there always a change in the state of matter from liquid to solid or gas?
 
  • #4
Borek
Mentor
28,635
3,106
Well, if you specifically ask for a reaction in which the reactant and product are in different phases then the phase change seems inevitable, doesn't it?
 
  • Like
Likes somasimple
  • #5
somasimple
Gold Member
756
5
You're The Man!
 
  • #6
47
23
There are plenty of redox reactions that occur entirely in solution, particularly among transition metal ions. Oxyhalide ions like bromate and hyopchlorite also effect oxidations without a phase change. A butane lighter is an example of gas-phase redox chemistry.

Batteries are a special case, since you almost always have a metallic anode.
 

Related Threads on RedOx question

  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
7
Views
9K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
1K
Replies
2
Views
2K
  • Last Post
Replies
9
Views
2K
Top