Organic Chemistry

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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?

  • Organic Chemistry -

    Would you expect benzoic acid to react with NaHCO3.
    C6H5COOH + NaHCO3 ==> CO2 + H2O + C6H5COONa

  • Organic Chemistry -

    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?

  • Organic Chemistry -

    An acid + NaHCO3 gives CO2 + H2O.

  • Organic Chemistry -

    after extraction with bicarbonate, in which layer is the benzoin?

  • Organic Chemistry -

    Is benzoin soluble in dichloromethane? in water?

  • Organic Chemistry -

    the lower (organic) layer contains the benzoin.
    slightly soluble in water

  • Organic Chemistry -

    after extractiowith bicarbonate, in which form is benzoic acid now in solution ???????

  • Organic Chemistry -

    sodium salt :)

  • Organic Chemistry -

    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????

  • Organic Chemistry -

    why wash the organic layer with distilled water?

  • Organic Chemistry -

    Why is carbon dioxide evolved when you shake the organic solution with sodium bicarbonate

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