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Fehling's solution A= concentrated aqueous solution of Copper (II) sulphate,
Fehling's solution B= solution of Sodium-potassium tarterate + sodium hydroxide.
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What is the pH of andesite?
Andesite does not have pH. pH is a measure of how acidic or basic an aqueous solution is, meaning a solution in which the solvent is water. Andesite is a rock, not an aqueous solution. The terms "acidic" and "basic" were once used by scientists to describe the composition of igneous rocks, but this was based on an incorrect interpretation of their chemistry. These terms were replaced with felsic and mafic respectively. In either case, andesite is considered intermediate.
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It is most similar to the composition of the rock basalt.
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 fehlings solution?
Fehling solution "A" is copper sulphate solution and Fehling solution "B" is a solution of sodium potassium tartrate and NaOH.
Why does the fehlings solution turn red?
When Fehling's solution is added to an aldehyde it turns brick red
Why is it important that fehlings solution be freshly prepared?
Fehling's solution must be freshly prepared because there is a tendency for it to oxidize if not used right away
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 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 happens to aldehyde when it reacts with fehlings solution or tollens solution?
Aldehyde are oxidised to the corresponding carbonic acid by F.'s or T.'s agents. Ketone can not be oxidised.
What is solution formula?
A solution has not a chemical formula; the solution has a composition.
What is the composition of 5 percent dextrose solution?
what is the composition of dextrose 5%
What is a positive result for the fehlings test?
Fehlins test is done to identify aldehides. Fehlins solution is used for this test. If aldehides are added to this soluton, a red precipitate is formed.
What is the fehlings test of glucose?
ulo nyo!!
Is an aqueous solution a system having a uniform composition and appearance?
Yes, an aqueous solution is a system having a uniform composition and appearance. If the solution is saturated, only the solution above the solid material will be uniform.
