Drug testing lab question

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Barbara Weiffenbach

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Jan 6, 2014, 12:08:32 PM1/6/14
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I am making up solutions for the drug testing lab. The teacher notes for the tannic acid solution state 10 g tannic acid + 100 mL water.  The tannic acid solution is fairly dark and the tannic acid isn't dissolving very well.  Does anyone have experience with this lab?  Am in a bit of a rush because students are doing the lab today.

Thanks for your help!

Barbara Weiffenbach

b...@bertinoforensics.com

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Jan 6, 2014, 4:15:07 PM1/6/14
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Let it sit overnight. Sorry. 
 
 
 
 
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