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Fehling's A and Fehling's B are used together in the Fehling's test to detect the presence of reducing sugars, such as glucose. Fehling's A is a copper(II) sulfate solution, while Fehling's B is a complex solution of potassium sodium tartrate and sodium hydroxide. They work together to oxidize the sugar, causing a color change that indicates the presence of a reducing sugar.
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What is the product obtained by combining fehlings a and fehlings b solution?
When the two Fehling Solutions A and B are mixed, a deep blue solution containing a complex cupric ion is formed. On interaction with reducing compounds such as aldehydes or sugars, the copper is reduced to the univalent stage, and a red, yellow, or yellowish green precipitate is formed.
What is fehlings solution?
Fehling solution "A" is copper sulphate solution and Fehling solution "B" is a solution of sodium potassium tartrate and NaOH.
What is the color when fehling a and fehling b are being mixed?
When Fehling A & B are mixed in equal quantities... Fehlings Reagent is formed which is DEEP BLUE in colour Hope that answers your question! :)
What is the fehlings test of glucose?
ulo nyo!!
What chemical formula for Fehlings reagent?
The Fehling A solution contain copper sulfate.The Fehling B solution contain sodium potassium tartrate and sodium hydroxide.
Why the oxidation of formic acid gives red precipitate while the oxidation of acetic acid not?
I think you are referring to the test using Fehlings solution. Fehlings solution oxidises aldehydes and ketones and formic acid and is in turn reduced. The red precipitate is the copper(I) oxide formed by reduction of the copper(II) complex found in Fehlings solution. Acetic acid is not readily oxidised and so there is no precipitate. See link for more information on what the complex is in Fehlings solution and how it is prepared.
Which is more sensitive test fehlings test or Benedicts test?
benedicts test
Which compound gives positive Fehlings test?
Fehling test is used for reducing sugars.
Why does the fehlings solution turn red?
When Fehling's solution is added to an aldehyde it turns brick red
Are substance considered reducing fehlings test also the substance reducing in benedicts test?
yes.
explain using sample equation, the application of benedicts tollens and fehlings test in hospital?
wrt
What other test material which can be used to replace Benedict's Solution in glucose test in food?
Barfoed's solution. Glucose as a monosaccharide and a reducing sugar would react positive to Barfoed's Test. Fehlings test (Solutions A and B) tests for reducing sugars but was replaced by Benedict's as a) less hazardous and b) you don't have to mix two solutions.
