[Procrastinate]

When Potassium Permanganate is titrated against Iron (II) sulphate solution, write the half equations:

I know that Potassium Permanganate has the formula:

5e- + 8H+ + MnO₄- -> Mn²⁺ + 4H₂O

However, I am not sure how to write Potassium Sulfate...I am confused as to what to do with that polyatomic ion. Polyatomic ions never oxidize right?

[Borek]

Spectators.

[cliverlong]

When Potassium Permanganate is titrated against Iron (II) sulphate solution, write the half equations:

I know that Potassium Permanganate has the formula:

5e- + 8H+ + MnO₄- -> Mn²⁺ + 4H₂O

However, I am not sure how to write Potassium Sulfate...

No potassium sulphate I can see in your original equation

As acidfied potassium permanganate is a strong oxidizing agent it will oxidize Iron(II) to Iron(III)

I am confused as to what to do with that polyatomic ion. Polyatomic ions never oxidize right?

Not true I think
If you consider mixing concentrated sulphuric acid with sodium bromide or sodium iodide , the hydrogen bromide or hydrogen iodide produced will reduce the sulphate to various products such as sulphur dioxide and hydrogen sulphide

http://www.chemguide.co.uk/inorganic/group7/halideions.html#top

Clive

[Procrastinate]

When Potassium Permanganate is titrated against Iron (II) sulphate solution, write the half equations:

I know that Potassium Permanganate has the formula:

5e- + 8H+ + MnO₄- -> Mn²⁺ + 4H₂O

However, I am not sure how to write Potassium Sulfate...

No potassium sulphate I can see in your original equation

As acidfied potassium permanganate is a strong oxidizing agent it will oxidize Iron(II) to Iron(III)

I am confused as to what to do with that polyatomic ion. Polyatomic ions never oxidize right?

Not true I think
If you consider mixing concentrated sulphuric acid with sodium bromide or sodium iodide , the hydrogen bromide or hydrogen iodide produced will reduce the sulphate to various products such as sulphur dioxide and hydrogen sulphide

http://www.chemguide.co.uk/inorganic/group7/halideions.html#top

Clive

Sorry, I meant Iron Sulphate.

However, from the response aforementioned, is it just:

Fe -> Fe²⁺ + 2e- since the SO4 is a spectator ion?


Thanks.

[AWK]

Fe -> Fe2+ + 2e- since the SO4 is a spectator ion?

Fe²⁺ =Fe³⁺ + e^-