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Topic: Iron II Sulphate and Iron III Sulphate  (Read 3117 times)

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Offline Ballistic

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Iron II Sulphate and Iron III Sulphate
« on: October 07, 2013, 10:18:14 AM »
Can anyone recommend a simple experiment to determine the presence of Iron II Sulphate or Iron III Sulphate?
e.g. you are given a sample and you want to know which it is. There is no need for ultra sensitive data, just a general determination of what it is? Any help appreciated as always.
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Offline Hunter2

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Re: Iron II Sulphate and Iron III Sulphate
« Reply #1 on: October 07, 2013, 10:37:43 AM »
Do you know prussian Blue?

Iron-II  reacts with red ferricyanide to a dark blue color.
Iron-II do the same with yellow Ferrocyanide.

Other option is to add thiocyanate, what gives blood red color, if iron-III is present.
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Offline Ballistic

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Re: Iron II Sulphate and Iron III Sulphate
« Reply #2 on: October 08, 2013, 10:46:57 AM »
You're a star. Do you have any idea what the result would be if it was a mixture of the two?
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Offline Hunter2

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Re: Iron II Sulphate and Iron III Sulphate
« Reply #3 on: October 08, 2013, 11:02:55 AM »
The mixture would show the same.

To determine both you can use Rheinhardt-Zimmermann Titration without SnCl2

or this receipe: http://www.123helpme.com/view.asp?id=122032
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