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What is meant by internal indicator?
Sometimes one of the reactants in a titration act as an indicator; this is an internal indicator. An example is the volumetric technique of permanganometry.
When does a spray of diphenylamine reagent on TLC gives blue coloration?
Diphenylamine is a reagent for DNA.
Why does diphenylamine turn blue?
Diphenylamine turns blue when it reacts with nitrate ions in the presence of sulfuric acid. This reaction forms a blue-colored complex called Ruhemann's purple. The intensity of the blue color can depend on the concentration of the reactants and the pH of the solution.
Diphenylamine will turn blue in the presence of?
DNA
What will diphenylamine turn blue in the prescense of?
Diphenylamine turns blue in the presence of nitrates. This reaction is commonly used in the Griess test to detect the presence of nitrate ions.
What is the chemical name for ferro iron indicator?
Magnetite? Diphenylamine - http://pubs.acs.org/doi/abs/10.1021/ie50183a043
Why is phosphoric acid used in redox titration where diphenylamine is used as indicator?
There are three indicators that may be used for the titration of Fe2+ with K2Cr2O7. These are diphenylamine, diphenylbenzidine and diphenylamine sulfonate. The colour change for all three indicators is green to violet and the standard electrode potentials are all ca 0.78 V. According to Kolthoff and Sandell, this should lie between the electrode potentials of the two reduction reactions. This not being the case, phosphoric acid is added to reduce the electrode potential for the Fe3+ → Fe2+ reaction by stabilising the ferric ion.
What is the difference between external and internal indicator?
what is the difference between the external & internal indicator
What is meant by internal indicator?
Sometimes one of the reactants in a titration act as an indicator; this is an internal indicator. An example is the volumetric technique of permanganometry.
When does a spray of diphenylamine reagent on TLC gives blue coloration?
Diphenylamine is a reagent for DNA.
What is external and internal indicator with examples .?
an indicator which is dissolved in the solution in whicdh the main reaction takes place- internal g. phenopthlein
Why does blue colour appears in diphenylamine test?
The appearance of a blue color in the diphenylamine test indicates the presence of a reducing sugar, such as a reducing sugar or pentose sugar. The reaction occurs when the sugar present in the sample reduces diphenylamine to form a blue compound.
Why does diphenylamine turn blue?
Diphenylamine turns blue when it reacts with nitrate ions in the presence of sulfuric acid. This reaction forms a blue-colored complex called Ruhemann's purple. The intensity of the blue color can depend on the concentration of the reactants and the pH of the solution.
What is Difference between internal and external indicators?
what is the difference between the external & internal indicator
Which indicator is used while titrating mohrs salt against potassium dichromate using internal indicator analysis?
ferroin indicator
How to prepare nitrate test solution using diphenylamine in sulphuric acid?
To prepare a nitrate test solution using diphenylamine in sulfuric acid, you can mix diphenylamine with concentrated sulfuric acid in a specific ratio. Typically, a 0.1% diphenylamine solution in concentrated sulfuric acid is used for nitrate testing. Follow safety precautions when working with concentrated sulfuric acid as it is corrosive.
Diphenylamine will turn blue in the presence of?
DNA
