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Why do you use external indicator in diazotization titration?
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.
Why in titration of kmno4 no indicator is used?
In the titration of KMnO4, no indicator is used because KMnO4 is a self-indicating titrant. It undergoes a color change from purple to colorless (or brown) at the endpoint of the titration, which makes it unnecessary to add an external indicator. The precise endpoint can be easily detected visually, making the use of an indicator redundant.
Why potassium ferricyanide cannot be used as internal indicator?
Potassium ferricyanide cannot be used as an internal indicator because it is an external indicator that does not change color in response to pH changes in a solution. Internal indicators are usually weak organic acids or bases that change color due to ionization changes as the pH of the solution shifts.
What are the sources of carbon dioxide Internal and External?
Internal sources of carbon dioxide include human respiration, while external sources include fossil fuel combustion, deforestation, and industrial processes. Both internal and external sources contribute to the overall increase in atmospheric carbon dioxide levels, which is a key driver of climate change.
What do living systems have that separates the internal chemicals from the external chemical environment?
Living systems have cell membranes that separate internal chemicals from the external chemical environment. These membranes control the movement of substances in and out of the cell, allowing for selective exchange of molecules and maintaining internal conditions necessary for life.
What is Difference between internal and external indicators?
what is the difference between the external & internal indicator
What is the difference between external and internal communications?
What is the difference between external and internal communications
What is the difference between external and internal indicator?
what is the difference between the external & internal indicator
What is the difference between external and internal stimuli?
internal is in and external is out
What is the difference between internal and external reproduction?
its internal and then its external. DEERRR
What is the db internal and external frontier?
difference between external and internal frontier
What is the difference between internal and external customer in hospitality industry?
What is internal and external customer?
Difference between internal and external stock holders?
internal holder is within while the external is outside
Difference between internal dtd and extrenal dtd?
difference between internal and external dtd
Difference between internal and external interrupt?
internal interrupt is synchronous with the program while external interrupts are asynchronous.
What are the disadvantages of a internal indicator?
Internal indicators may not provide accurate or timely information about external conditions or factors affecting the organization. They may also be influenced by biases or internal perspectives, leading to potential blind spots or misinterpretations. Additionally, relying solely on internal indicators may limit the organization's ability to adapt to changing external environments.
What is the difference between internal and external validity?
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.
