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

Hammered hippie · 2011-12-30 16:43:28

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…

30-12-2011 4:43pm

#1

Hammered hippie

Registered Users, Registered Users 2 Posts: 121 ✭✭

Join Date: July 2008

Posts: 103

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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