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No, starch does not reduce Fehling's solution. Starch is a polysaccharide composed of glucose molecules linked together, whereas Fehling's solution is a complex of copper sulfate, sodium hydroxide, and potassium sodium tartrate used to test for the presence of reducing sugars. Starch is not a reducing sugar and therefore will not react with Fehling's solution.

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1y ago

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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.


What is the original colour of fehlings a solution?

Fehling's A solution is blue in color due to the presence of copper sulfate.


What is the original colour of fehlings solution?

Fehling's solution is originally blue in color due to the presence of copper ions.


Is potato starch a solution?

Starch is not a solution.


What is the organic compound that reacts when iodine is added to starch solution?

The organic compound that reacts with iodine in a starch solution is amylose, which is a polysaccharide and a component of starch. When iodine is added to a starch solution, it forms a blue-black complex with the amylose present in the solution.


What chemical formula for Fehlings reagent?

The Fehling A solution contain copper sulfate.The Fehling B solution contain sodium potassium tartrate and sodium hydroxide.


What does IKI solution test for?

IKI solution is used to test for the presence of starch. Starch will turn blue-black in the presence of IKI solution, indicating a positive test result for the presence of starch.


What chemical is used to test for starch and what is the result if starch is present?

The chemical is called Iodine solution. If starch is present, the iodine solution will turn from amber to blue black.


What color change does starch indicator solution make in the absence of starch?

Starch indicator solution will remain its original color (usually colorless) in the absence of starch. Without starch present, there will be no color change observed when using starch indicator solution.


Which white powder turns blue-black in iodine solution?

Starch powder turns blue-black in iodine solution due to the formation of a starch-iodine complex.


What is the difference between iodine solution and starch solution?

Iodine solution is a brownish liquid used to test for the presence of starch, turning blue-black in the presence of starch. Starch solution, on the other hand, is a clear liquid made by dissolving starch in water.


What happens when iodine is added to a starch solution that also contains vitamin C?

The iodine will turn the starch solution blue-black due to the formation of a starch-iodine complex. If the starch solution also contains vitamin C, the vitamin C may react with the iodine, preventing the blue-black color change from occurring. This is because vitamin C is a reducing agent and can reduce iodine back to its colorless form.