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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: lrisNil on April 02, 2016, 08:57:59 PM

Title: Techniques To Determine Weight Percent
Post by: lrisNil on April 02, 2016, 08:57:59 PM
If there's an unknown containing a mixture of CaCO3 and NaCl,
What simple experimental procedure could I use determine the weight percentage of CaCO3 and NaCl in this unknown?

So far I know there is gravimetric analysis, thermo-gravimetric analysis, atomic absorption, titrations, and ion selective electrodes albeit not all of these are "simple" to me at least haha

Thanks for any suggestions
Title: Re: Techniques To Determine Weight Percent
Post by: Borek on April 03, 2016, 03:34:53 AM
Many ways to skin that cat. Basically any method of determining amount of one of the substances in the mixture will work.

What reactions of NaCl do you know?

What reactions of CaCO3 do you know?
Title: Re: Techniques To Determine Weight Percent
Post by: Arkcon on April 03, 2016, 05:21:22 AM
Quote from: lrisNil on April 02, 2016, 08:57:59 PM
So far I know there is gravimetric analysis, thermo-gravimetric analysis, atomic absorption, titrations, and ion selective electrodes albeit not all of these are "simple" to me at least haha

Do you know how each of these analytical methods work?  What sort of information would thermogravimetric analysis give you for a sample of NaCl?  This will help you narrow down your thought process, so the task appears less daunting for you.