Asked by Davia

The separation of a mixture of benzoic acid and benzoin in dichloromethane into its pure compounds by a combination of solvent extraction , distillation and recrystallization. Why is carbon dioxide evolved when the organic solution is shaken with sodium bicarbonate? what is the equation for this reaction?
Answered by DrBob222
Would you expect benzoic acid to react with NaHCO3.
C6H5COOH + NaHCO3 ==> CO2 + H2O + C6H5COONa
Answered by Davia
yes...i think...two layers are formed after shaking so i guess this is extraction of the benzoic acid from the benzoin so i am asked to state why carbon dioxide evolved ...what statement could i give?
Answered by DrBob222
An acid + NaHCO3 gives CO2 + H2O.
Answered by Tasha
after extraction with bicarbonate, in which layer is the benzoin?
Answered by DrBob222
Is benzoin soluble in dichloromethane? in water?
Answered by Davia
the lower (organic) layer contains the benzoin.
slightly soluble in water
Answered by Davia
after extractiowith bicarbonate, in which form is benzoic acid now in solution ???????
Answered by Davia
sodium salt :)
Answered by Davia
what could be possible answers to these two questions.....1 why determine the amount of solvent by difference and not by weighing the final distillate?????
why not distill off all the solvent at the very beginnig and then separate the solid residue of benzoic acid and benzoin recrystallisation????
Answered by Lisa
why wash the organic layer with distilled water?
Answered by Victoria
Why is carbon dioxide evolved when you shake the organic solution with sodium bicarbonate
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