Net Ionic Equation for Fe(NH4)2(SO4)2.6H2O + KMnO4 Reaction"

[Hockeystar]

Homework Statement

Give the net ionic equation for this reaction:

Fe(NH₄)₂(SO₄)₂.6H₂O + KMnO₄

Homework Equations

Reducing reaction is

4H⁺ + MnO₄^- + 3e ---> MnO₂ + 2H₂O

Oxidation

3Fe⁺² ---> 3Fe⁺³ + 3e

The Attempt at a Solution

4H⁺ + MnO₄^- + 3Fe⁺² ---> MnO₂ + 2H₂O + 3Fe⁺³

My question is is this a basic or acidic solution? I'm assuming acidic because ammonium with have a tendency to lose it's H+. Is this the net ionic equation or do I have to include more? Can someone confirm wether or not my answer is corrent

 

[Borek]

Permanganate titrations are done in low pH, where permanganate gets reduced to Mn²⁺.

http://www.titrations.info/permanganate-titration

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[Hockeystar]

sweet so it looks like My equation was correct.

 

[Borek]

No - MnO₂ ad Mn²⁺ are two different things.

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[Hockeystar]

Hmmmm. The website you provided me with says Permanganate can be reduced into MnO2, Mn2+, or MnO4(-2) depending on the pH. Does this mean I have to use my molar concentrations to figure out which one it is?

 

[Borek]

All these reactions are used in analytical chemistry, but the most popular is the use of permanganate in low pH solutions.

I don't remember titration methods that will not reduce permangante to Mn²⁺. This is the only way of being sure that the reaction can't proceed further and hence has known stoichiometry.

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[Hockeystar]

Thank You. The reaction that shoyuld take place is then.

5Fe2+ + MnO4- + 8H+ → 5Fe3+ + Mn2+ + 4H2O

 

[Borek]

Correct.

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methods

 

[lilnikki316]

I know I am going to sound like a complete moron but I am lost! In my high school they offer this chemistry class. They call it pre-college chemistry. Well i am more confused than britany spears on crack. I need help with redox reaction?

 

[Borek]

PLease don't hijack the threads.

See balancing redox reactions.