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August 30, 2014

Homework Help: Chemistry

Posted by Natasha on Friday, March 12, 2010 at 2:19am.

I am about to do an extraction experiment, and needed help with a question to improve my understanding. Any help appreciated.

1. You have 150 ml of a solution of benzoic acid in water estimated to contain about 5g of the acid. The distribution coeffcient of benzoic acid in benzene and water is approx. 10. Calculate the amount of acid that would be left in the water solution after three 50 ml extractions with benzene. SO the same calculation using one 150ml extraction with benzene to determine which method is more efficient.


Also I was wondering why three small extractions are more efficient than one large extraction, and how can this be proven?

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