question 1 A mixture of (I) benzoic acid, an aromatic acid, (II) dodecane, an al

Question

question 1

A mixture of (I) benzoic acid, an aromatic acid, (II) dodecane, an alkane, and (III) benzocaine, an aromatic base, is dissolved in dichloromethane. The solution is extracted with aqueous HCl and the layers separated. Assuming 100% efficience in the extraction, which susbstance(s) will be found in the dichloromethane layer?

I

II

III

I and II

none of the above

question 2

What is the best method for separating a 50:50 mixture of mesitylene (mp -45°C, bp 162°C, nonpolar and aromatic) and N-propylamine (mp -93.5°C, bp 161.5°C, nonaromatic, basic)?

dissolving the mixture in an ether solvent followed by extraction with aqueous HCl

fractional distillation

recrystallization

gas chromatography

thin layer chromatography

I

II

III

I and II

none of the above

Explanation / Answer

question 1 A mixture of (I) benzoic acid, an aromatic acid, (II) dodecane, an al

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