[smith1986]

Hi

For my plan I have a reaction where Iron II reduce aqueous chlorine.  This is the formula I have for it:

cl2 + 2fe2+ -----> 2fe3+   +  cl-

I was just wondering for this reaction what the method would be.  I think it is simply add cl2(aq) to excess of fe2+(aq) in a conikal flask and the reaction will take place.  Are there any other things needed like higher temp etc.

Any help accpreicated.

[xiankai]

i think its more like chlorine oxidises iron (II)

chlorine is a very strong oxidising agent as it is readily reduced from gas to ion.

[Donaldson Tan]

xiankai is right. if you want to reduce chlorine, try methanoic acid. i think the reaction will be a lil' slow but still works fine. methanoic acid will be oxidised by chlorine to form carbon dioxide.

[Borek]

cl2 + 2fe2+ -----> 2fe3+   +  cl-

Should work without problems, no idea about kinetics. Heating may help.

Do you have to stick to Fe2+? And what is your priority - reducing Cl2? Or just some redox process?

[smith1986]

the solution is added t an excess of a suitable reducing agent such as iron (II) compounds.

Thanks for your replies

[smith1986]

cl2 + 2fe2+ -----> 2fe3+   +  cl-

Are there signs to show that the reaction has been finished or does one presume it has because an excess of fe2+ was added so all the cl2 reacted?

Thanks

[charco]

the reaction is effectively instantaneous but there is no great colour change simply a darkening of the solution from pale green to more orange (FeII to FeIII)

[xiankai]

u gotta add excess Cl2 not Fe becos Fe is coloured, while Cl's colour is less distinguishable(gas)

and Fe(III) shld be brown, its is rust after all :/

[charco]

The colour of Fe(III) depends on the ligands atached to it - it may be yellow, orange, red or brown in any shades and intensities

[song-an]

i beleive that we are now facing the same task right....and from what i am told....we need to make our own reducing agent....is it true...
and then how to make it...
can i just simple use FeSO4 that have been supplied by the school or how....
thanks...  

[Donaldson Tan]

which substance do you aim to produce? Fe3+ or Cl-?