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Topic: How to titration sodium hydroxide ???  (Read 6567 times)

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Offline bluemonster

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How to titration sodium hydroxide ???
« on: October 05, 2006, 09:06:41 AM »
Please help me !!!
how to titrate sodium hydroxide which is mixed by sodium carbonate as the impurity ???
I hope to you answer about what is method ? what do the method base on (what is theory?)
thanks a lot !  8)
« Last Edit: October 06, 2006, 02:13:21 AM by bluemonster »
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Offline Alberto_Kravina

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Re: How to titration sodium hydroxide ???
« Reply #1 on: October 05, 2006, 10:43:24 AM »
Quote from: bluemonster on October 05, 2006, 09:06:41 AM
Please help me !!!
how to titration sodium hydroxide which is mixed by sodium carbonate as the impurity ???
I hope to you answer about what is method ? what do the method base on (what is theory?)
thanks a lot !  8)
Have you ever heard about WInkler and Warder method?

http://www.chemicalforums.com/index.php?topic=8503.msg44729#msg44729
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Offline bluemonster

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Re: How to titration sodium hydroxide ???
« Reply #2 on: October 06, 2006, 04:43:28 AM »
hehehe, thanks you for your support !!!  ;D
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labrat41

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Re: How to titration sodium hydroxide ???
« Reply #3 on: September 30, 2007, 11:04:58 PM »
There is another way. It is a thermometric titration with bicarbonate:

OH- + HCO3- <-> CO3-- + H2O

You use 1mol/L KHCO3 as titrant (it's more soluble than NaHCO3). It does need frequent standardization, but it has the advantage that it is not subject to interference. However, you do need a good automated thermometric titration system.
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