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Replacing Fehling's solution ingredient with one from Benedicts solution?

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  • 30-12-2011 5:43pm
    #1
    Hammered hippie
    Registered Users Posts: 121 ✭✭


    I am trying to make a working Fehling's or Benedicts solution just to show the difference between Sucrose and Fructose+Glucose.

    Now I will split the Sucrose to make a solution of Fructose+Glucose by heating in either a mild acid or a mild alkaline.

    I have the following ingredients to make the Fehling's or Benedicts solution.
    Cream of Tartar (=rochelle salt) , CuSO4 and Sodium Carbonate (washing soda).
    I don't have and don't want to use NaOH which would enable me to make the Fehling's solution (=Rochelle Salt+NaOH and then add CuSO4 prior to use) and I don't have the Citric acid to make Benedicts solution (=Citric acid+CuSO4+Sodium Carbonate).
    In my opinion the following combination would also work...Rochelle Salt + CuSo4 and then Sodium Carbonate.
    It probably would react a bit less effective than the Fehling's or the Benedict...but it would peform the reaction necessary to turn CuSo4 ino Cu2O.
    If someone with a bit more knowledge could explain to me whether this would work or whether one really only can have the Rochelle Salt + NaOH or the Citric Acid + Sodium Carbonate combination I would be really thankfull.

    Many thanks for your help


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