Internal indicators that are used in titration exist in the titration reaction as either a reactant or a product. External indicators is added to the reaction mixture, but does not exist in the reaction.
what is science
Because KMnO4 is an internal indicator.. No need to have any indicator.. it has distinctly different colour when it is reduced
external indicator is required in diazotization as to observe the end point of the reaction. internal indicators cannot give the endpoint because they may form complexes which may cause hindrance. for example, in the assay of sulfa drugs, iodine-starch paste is used as external indicator, because if we add iodine paste in the conical flask it will react with the reactants and give the blue-black coloration in the beginning of the actions, which will not tell the end point of the reaction. instead, the iodine-starch paste is applied in a paper, and the compound from the burette is added in small quantities into the sulfa drug solution, and after every few milliliters a drop of solution from the conical flask is dropped on the iodine-starch paste, when there is sudden change in colour, the addition from the burette is stopped. and observations are made.
membrane
Internal/External
what is the difference between the external & internal indicator
What is the difference between external and internal communications
what is the difference between the external & internal indicator
internal is in and external is out
its internal and then its external. DEERRR
difference between external and internal frontier
What is internal and external customer?
internal holder is within while the external is outside
difference between internal and external dtd
internal interrupt is synchronous with the program while external interrupts are asynchronous.
More parts, like a case, indicators and a power supply.
The difference between internal and external validity is in their nature. Internal validity indicates if a study depicts relation between two variables. External validity on the other hand generalizes the study of the variables.