October 19, 2021, 05:36:43 AM
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Topic: Complexometric Titration  (Read 1009 times)

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Offline fairymolds

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Complexometric Titration
« on: July 07, 2021, 12:48:18 PM »
Hello. I have a question about a problem I'm solving. It says here a sample of serum was treated with KOH, added with a Cal-Red indicator, and finally with EDTA. Then, it asks for the level of Calcium in the serum. I understand that complexometric titrations are for metals except for the 1A/alkali metals. I've written the chemical reaction that I think happens.
Ca2+ + KOH ---> CaOH2 + K
At this point, I get confused. Will Ca(OH)2 react with EDTA? I've searched for this but the only results are calcium carbonate with EDTA. 
The problem requires the levels of Ca in mg/dl and in meq/L. I've been solving this for hours but my answers are way big to be answers. I did not include the given numerical values. I am only after understanding what really happens in this kind of titration. Thank you! 

Offline fairymolds

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Re: Complexometric Titration
« Reply #1 on: July 07, 2021, 06:10:11 PM »
Nevermind, thankfully I got it after hours  ;D
Also figured I can't delete a thread  ;D

Offline billnotgatez

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Re: Complexometric Titration
« Reply #2 on: July 08, 2021, 04:15:29 AM »
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