This video will clearly explain preparation Fehling B solution. Fehling B is a Colorless aqueous solution prepared by dissolving Potassium tartrate in an aqueous solution of sodium hydroxide. It is also known as Potassium sodium tartrate solution. Fehling B solution used along with equal volume of Fehling A solution (Called Fehling’s reagent) for Fehling’s test. Fehling's reagent is used to detect reducing sugars and distinguish between water soluble carbohydrates and ketone functional groups. The positive result indicated by the presence of a red precipitate in the solution.
Fehling B Reagent
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