How check purity of ferric chloride by titration method?

Question

what is the gravimetery method for ferric chloride, to check purity?

Answer 1

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Answer

Titration method

Dissolve a known quantity in water make up volume say to 250 / 500 ml. Use wighing bottle. It is very hygroscopic in nature. Take a known quantity from the solution , acidify by using 6N HCl, add KI, titrate the iodine liberated by standard thiosulphate soln.

2 KI + 2 FeCl3 + 0 HCl = 2 KCl + I2 + 2 FeCl2

Gravimetric method

You can use option 2 in the reference. Titration method is very accurate and very quick. You may like to use it

http://www.csudh.edu/oliver/che230/textbook/ch03.h...