Redox Reaction

  • Thread starter danago
  • Start date
  • #1
danago
Gold Member
1,122
4

Homework Statement


Excess acidified potassium permanganate is added dropwise to an ammonium iron(II) sulfate solution. Write an overall redox equation for this process.

2. The attempt at a solution
Well im not really sure what to do. I dont know what products are being formed. What should i do in a situation like this?
 

Answers and Replies

  • #2
397
0
Start with a balanced equation. Were you given the rules to follow for a redox reaction?
 
  • #3
Gokul43201
Staff Emeritus
Science Advisor
Gold Member
7,051
18
What is the one thing that you neeed to know about potassium permanganate?
 
  • #4
danago
Gold Member
1,122
4
How do i write a balanaced equation though? I dont know what the products are
 
  • #5
danago
Gold Member
1,122
4
What is the one thing that you neeed to know about potassium permanganate?
Its soluble in water?
 
  • #6
Gokul43201
Staff Emeritus
Science Advisor
Gold Member
7,051
18
Lots of things are soluble in water.

I quote from the first paragraph of the wiki on potassium permanganate:

Potassium permanganate is the chemical compound KMnO4. In this salt, manganese is in the +7 oxidation state. The salt is also known as "permanganate of potash" and "Condy's crystals". The permanganate ion is a strong oxidizing agent. It dissolves in water to give deep purple solutions, evaporation of which gives prismatic purple-black glistening crystals. It has a sweet taste and is odourless.
 
  • #7
danago
Gold Member
1,122
4
Ok, so its an oxidising agent, and therefore, itself reduced. I think this is the correct equation for its reduction:

[tex]
MnO_4 ^ - _{(aq)} + 8H^ + _{(aq)} + 5e^ - \to Mn^{2 + } _{(aq)} + 4H_2 O_{(l)}
[/tex]

Would i just combine that with the half equation of iron (II) being oxidised to iron (III) ions?
 
  • #8
Gokul43201
Staff Emeritus
Science Advisor
Gold Member
7,051
18
Yup, you got it! :approve:
 
  • #9
danago
Gold Member
1,122
4
Ahh ok. Thanks :)
 

Related Threads on Redox Reaction

  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
17K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
3
Views
10K
  • Last Post
Replies
2
Views
16K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
7
Views
3K
Top