44036

Amount of iron in Iron (III) Chloride  

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Hi,I am a second year college student (In America I would be in my last year at high school I think,I'm seventeen??), and I am sturggling with my chemistry coursework. I need a method of analysing the amount of iron in Iron (II) chloride. So far I have done colorimetry, and a titration using iodine,sodium thiosulphate, etc etc.
I need one or two more methods, the more interesting the better. My college does not have the neccesary indicator for me to do an EDTA titration, so I have run out of ideas, and my deadline is coming up all too fast.Thanks,

Olivia M
Student - Havant, Hampshire, UK

You could try adding an excess of EDTA, then backtitrating to a red endpoint, using a zinc or manganese solution as titrant, and Eriochrome Black T as the indicator.

The EDTA is added at low pH, then you raise the pH to 10 with ammonium hydroxide for the back.

Dave Wichern - The Bronx, New York

Dear Olivia,
There are several ways to check Iron. The thing I dont understand why would your college gives you something where they can not even provide the necessary tools or they are asking you to come up with your own method. Intersting!!
How about an AA (atomic absorption unit). If your college has that then you can dilute the Iron chloride and back calculate....but I am not sure how would you do it if you are not trained on it.
Good luck with your project
Hemant
Process engineer in a plating shop

Hemant Kumar
- Florida, USA