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Topic: 0.1N EDTA = 0.1M EDTA???  (Read 18204 times)

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Offline angst

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0.1N EDTA = 0.1M EDTA???
« on: August 01, 2007, 10:25:21 PM »
I need to use 0.1N EDTA for titration, but now I only have 0.1M EDTA, I would like to know the equivalent of EDTA to make sure whether 0.1N of EDTA = 0.1M EDTA??

Can somebody help me in this??

Thanks.

Offline constant thinker

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Re: 0.1N EDTA = 0.1M EDTA???
« Reply #1 on: August 01, 2007, 10:35:51 PM »
N denotes normality which is just a unit of concentration. I've never used, and I've only seen it once.

This website has a description of normality. Just scroll down a little ways.

As far as converting between normality and molarity, someone might be able to tell you how, or google it.
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Offline sjb

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Re: 0.1N EDTA = 0.1M EDTA???
« Reply #2 on: August 03, 2007, 02:27:38 PM »
As I've suggested at http://www.chemicalforums.com/index.php?topic=18410.msg70474, the issue with normalities is that you need a reaction to "titrate" against.

I'd suggest that if you're talking tetravalent ions, like Ce(IV); 0.1N = 0.1M, but for monovalent, 0.1N = 0.025M.

S

Offline angst

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Re: 0.1N EDTA = 0.1M EDTA???
« Reply #3 on: August 03, 2007, 08:59:04 PM »
This EDTA I mentioned here is use to determine the total zinc in electrolytes. So, is it 0.1N = 0.1M???

Offline sjb

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Re: 0.1N EDTA = 0.1M EDTA???
« Reply #4 on: August 07, 2007, 04:31:24 PM »
As Zinc is divalent, I think 0.05M == 0.1N, but am not 100% certain

S

Offline angst

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Re: 0.1N EDTA = 0.1M EDTA???
« Reply #5 on: August 08, 2007, 12:17:41 AM »
Thanks  :D

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