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Procedure for Titration of ferric chloride ?




Does anyone know a specific test method for titrating a ferric chloride [on eBay or Amazon] etch solution, (i.e., what is the oz/gal of FeCl3)? The tank has been made up of 45 oz/gallon FeCl3, and 12% by volume HCl. I have a test method for ferrous chloride and total iron, but not ferric chloride [on eBay or Amazon].

Travis Larsen
Gear Manufacturer - Park City, Utah
2003



Didn't you answer your own question? You can measure ferrous and you can measure total Fe. Well, the difference is ferric.

Jon Barrows
Jon Barrows, MSF, EHSSC
GOAD Company
supporting advertiser
Independence, Missouri
goadbanner4
2003



2003

Dear Sir,

we utilise such a solution with Hydrochloric Acid at 100-120g/litre and ferric chloride[on eBay or Amazon]Hexahydrate at 400-500g/litre concentration.

To analyse for ferric chloride[on eBay or Amazon]potentiometrically, I take a 0.5ml sample of process solution, dilute to 100 mls with de-ionised water and add 5 gms of Potassium Iodide together with a small bar magnet to stir the solution then run the sample on the auto-titrator with 0.1N sodium thiosulphate [on eBay or Amazon] solution. The end-point comes at approximately 17mls of Sodium Thiosulphate (usually about 250mV)

If you have such equipment at your disposal I would give it a try!

Good luck

Nigel Gill, B.Sc. MIMF
- Blantyre, South Lanarkshire, Glasgow


Where did you get you method for Ferrous Chloride?

Scott Gray
testing - Latrobe Pennsylvania
December 3, 2009




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