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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.
Is diphenylamine organic or inorganic?
organic
What are the methods for estimation of DNA?
diphenylamine reagent
Diphenylamine will turn blue in the presence of?
DNA
What is the chemical name for ferro iron indicator?
Magnetite? Diphenylamine - http://pubs.acs.org/doi/abs/10.1021/ie50183a043
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.
Why does the Diphenylamine test only react with DNA?
diphenylamine binds with the deoxyribose molecule to form a blue complex
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?
Blue color appears in diphenylamine test because of the reaction of nitrates.
Is diphenylamine organic or inorganic?
organic
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
Why in titration of kmno4 no indicator is used?
Because KMnO4 is an internal indicator.. No need to have any indicator.. it has distinctly different colour when it is reduced
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.
