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?
Would you expect benzoic acid to react with NaHCO3.
C6H5COOH + NaHCO3 ==> CO2 + H2O + C6H5COONa
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?
An acid + NaHCO3 gives CO2 + H2O.
after extraction with bicarbonate, in which layer is the benzoin?
Is benzoin soluble in dichloromethane? in water?
the lower (organic) layer contains the benzoin.
slightly soluble in water
after extractiowith bicarbonate, in which form is benzoic acid now in solution ???????
sodium salt :)
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????