What Forms at the Anode During Electrolysis of Molten Chromium Sulphate?

In summary, during the electrolysis of a molten sulphate, chromium forms at the cathode while sulfur dioxide and oxygen are produced at the anode. However, there is also a possibility of peroxodisulfate formation. The use of this method in water solution is a common practice in hydrogen peroxide production, but its effectiveness in molten state remains uncertain. It is unlikely that sulfur dioxide will be produced through reduction at the anode, but the oxidation of oxygen to produce SO3 seems to be a viable option. However, the actual outcome may differ from theoretical predictions.
  • #1
yvan300
13
0
During the electrolysis of a molten sulphate, for example Chromium sulphate. At the cathode, chromium forms but what forms at the anode? Is it sulphur dioxide and oxygen?
 
Physics news on Phys.org
  • #2
Peroxodisulfate? Why dioxide and not trioxide?

But honestly I am just thinking aloud.
 
Last edited by a moderator:
  • #3
Wow, that comment confused me more :D
 
  • #4
Electrolytic oxidation of sulfate to peroxodisulfate in water solution is part of the old method of a hydrogen peroxide production, no idea if it will happen in molten state as well - but perhaps it can.

To get sulfur dioxide you need to reduce sulfur from VI to IV, and reduction at anode doesn't sound plausible to me. On the other hand oxidation of oxygen and production of SO3

2SO42- -> 2SO3 + O2 + 4e-

seems to be reasonable idea.

But this is just shifting of the atoms on paper, reality can be completely different.
 
Last edited by a moderator:
  • #5
Thanks :)
 

FAQ: What Forms at the Anode During Electrolysis of Molten Chromium Sulphate?

What is electrolysis?

Electrolysis is a process in which an electric current is passed through a substance, causing a chemical reaction to occur.

What is a molten sulfate?

A molten sulfate is a substance that has been heated to a high enough temperature to melt into a liquid state. In this context, it refers to a sulfate salt that has been melted.

How does electrolysis of a molten sulfate work?

In electrolysis of a molten sulfate, the molten sulfate is used as the electrolyte (conductor) between two electrodes. When an electric current is passed through the molten sulfate, the sulfate ions (SO4) in the electrolyte will be attracted to the positive electrode (anode) and release oxygen gas. The metal ions in the electrolyte will be attracted to the negative electrode (cathode) and deposit onto it as a pure metal.

What are the applications of electrolysis of a molten sulfate?

Electrolysis of a molten sulfate is commonly used in the extraction and purification of metals, such as aluminum, magnesium, and zinc. It is also used in the production of sulfuric acid and in certain industrial processes.

Are there any environmental concerns with electrolysis of a molten sulfate?

The main environmental concern with electrolysis of a molten sulfate is the energy consumption. The process requires a significant amount of electricity, which is often generated from non-renewable sources and can contribute to air pollution and greenhouse gas emissions. However, advancements in renewable energy sources are helping to mitigate this concern.

Similar threads

What Happens at the Anode During Electrolysis of Sodium Sulphate and Why?
Replies
19
Views
6K
Chemistry Amount of water electrolyzed during PEM electrolysis
Replies
26
Views
4K
Anode designation in a lead acid cell
Replies
3
Views
2K
What Forms on the Cathode During Electrolysis of Iron(II) Sulphate?
Replies
4
Views
14K
Is electrolyte chemical consumed during alkaline water electrolysis?
Replies
6
Views
2K
Electrolysis of aq CuCl2 with Ag electrode
Replies
8
Views
7K
Electrolysis: Dark blue oxide from steel?
Replies
6
Views
2K
Electrolysis Molten Metal Halides (Salts)
Replies
2
Views
7K
Electrolysis of dilute aqueous solutions
Replies
1
Views
7K
B What is the difference between N = Q/nF and m = Z*I*t in electrolysis?
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top