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To determine the conc. Of ethanoic acid, vinegar

  • 22-11-2015 2:14am
    #1
    Take Your Pants Off
    Registered Users Posts: 1,511 ✭✭✭


    Getting mixed feedback on this experiment, in the qs 1 section of the chem paper.
    Some saying to study it. Others not study it as they removed from course.
    Could not come into cleat conclusion. Even after searching previous threads.
    What really is it? Study or not ?
    Thank you


Comments

  • #2
    hubluh
    Registered Users Posts: 69 ✭✭hubluh


    Take Your Pants Off wrote: »
    Getting mixed feedback on this experiment, in the qs 1 section of the chem paper.
    Some saying to study it. Others not study it as they removed from course.
    Could not come into cleat conclusion. Even after searching previous threads.
    What really is it? Study or not ?
    Thank you

    These experiments are no longer examined:

    (i)the preparation of ethanal
    and
    (ii) the preparation of ethanoic acid by the oxidation of ethanol using acidified sodium dichromate.

    So , the determination of the concentration of vinegar is still on the course and can still be examined an experiment question.


  • #3
    Inspector Coptoor
    Registered Users Posts: 6,818 ✭✭✭Inspector Coptoor


    To determine the concentration of ethanoic acid in vinegar as weak acid vs a strong base titration is still very much on the course but as mentioned above, the oxidation of ethanol to ethanal and subsequent oxidation of ethanal to ethanoic acid using sodium dichromate as the oxidizing agent is no longer on the course due to the Cr2O7 being considered a carcinogen.

    Hope this helps


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