Hydrogen peroxide/ sulfuric acid mixture

  • Thread starter mishima
  • Start date
  • #1
532
31
Hi, I'm not sure what I just created. First I mixed sodium iodide with hydrochloric acid. Then to that I added a hydrogen peroxide/ sulfuric acid mixture (thinking it was just hydrogen peroxide). It seems a black precipitate is forming.

I was trying to make potassium iodide using an inherited box of mystery chemicals (probably not a good idea, granted) from a previous teacher for elephant toothpaste demo.
 

Answers and Replies

  • #2
Borek
Mentor
28,629
3,103
Compare

 
Last edited by a moderator:
  • #3
532
31
It is similar, yes. I just sort of did a double take when I realized I wasn't working with hydrogen peroxide, but some mixture of h2o2 and sulfuric acid. I was thinking maybe sulfur precipitated as well given the smell. It also has a much finer grain and slightly greyish color.
 
  • #4
AGNuke
Gold Member
455
9
Sulphur as far as I remember, is yellow colour. Hydrogen Peroxide is usually mixed with little sulphuric acid or phosphoric acid or glycerine, as they work as negative catalyst in the disproportionation reaction, in which Peroxide converts into water and dioxygen. (Considering I remember I had been taught)

As for Sulphur, I am not sure that Sulphuric acid has enough strength to oxidise Peroxide and get reduced itself to form Sulphur, so chances of sulphur formation is nil.
 
  • #5
532
31
Ok, I guess the sulfuric acid wasn't really part of it after all.
 
  • #6
1,679
3
Please don't brush an elephant's teeth with your concoction.
 
  • #7
AGNuke
Gold Member
455
9
Don't worry, elephants' teeth are hard to reach. He won't bother. :wink:
 

Related Threads on Hydrogen peroxide/ sulfuric acid mixture

  • Last Post
Replies
6
Views
14K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
11
Views
960
  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
5
Views
27K
Replies
4
Views
5K
  • Last Post
Replies
3
Views
1K
Top