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What chemical formula for Fehlings reagent?
The Fehling A solution contain copper sulfate.The Fehling B solution contain sodium potassium tartrate and sodium hydroxide.
Is honey a reducing sugar or non reducing?
yes because honey is a monosaccharide All monosaccharides reduce weak oxidizing agents such as Cu2+ in fehlings's reagent.
Which is more sensitive test fehlings test or Benedicts test?
Benedict's test is more sensitive than Fehling's test for detecting reducing sugars in a sample. Benedict's reagent has a lower detection threshold and is known to give more accurate results compared to Fehling's reagent.
Why ketone do not react with Fehlings solution and Tollens reagent?
Ketones do not react with Fehling's solution or Tollens' reagent because they lack the free aldehyde group necessary for these reactions to occur. Both Fehling's solution and Tollens' reagent depend on the presence of the aldehyde group to participate in redox reactions that lead to the formation of a colored precipitate. Without this aldehyde group, ketones do not undergo these reactions.
What is the molecular formula of schiff reagent?
The molecular formula of Schiff reagent is C20H15N3. It is a chemical reagent used for detecting the presence of aldehydes or ketones in organic compounds.
Reaction of benzaldehyde with Schiff's reagent?
The Schiff reagent is a product of Fuchsine or Pararosaniline. The Schiff reagent is used to test for aldehydes. Benzaldehyde is added to the decolorized Schiff reagent and a purple/magenta color appears.
What is the fehlings test of glucose?
ulo nyo!!
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.
After hydrolysis did sucrose give a positive test with fehlings test why orwhy not?
Sucrose would not give a positive test with Fehling's reagent after hydrolysis because sucrose is a non-reducing sugar. During hydrolysis, sucrose is broken down into its monosaccharide components (glucose and fructose), which are reducing sugars and can react with Fehling's reagent to give a positive test for reducing sugars.
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! :)
Which compound gives positive Fehlings test?
Fehling test is used for reducing sugars.
What happen when you react sugar like glucose and fructose with tollen' s reagent and the Fehlings solution?
Glucose oxidizes very quickly, and creates a silver mirror layer between the glucose solution and the Tollens' reagent. This is because of how the ketose reacts and reduces the silver molecules in Tollen's reagent.
