Why KMnO4 is widely used in volumetric analysis as a standard and oxidizing?

It is a strong oxidizing agent. It decomposes on contact with certain organic substances. It is widely used as a standard (volumetric) oxidizing solution because of its intense colour which serves as an indicator in titrations besides its low cost.

Why KMnO4 is widely used in redox titrations?

KMnO4 acts as an indicator of where the permanganate ions are a deep purple colour. In this redox titration, MnO4– is reduced to colourless manganous ions (Mn2+) in the acidic medium. The last drop of permanganate gives a light pink colour on reaching the endpoint.

Can KMnO4 be used as a primary standard in a redox reaction?

KMnO4 is not used as primary standard because it is difficult to obtain the pure state of KMnO4 as it is not free from MnO2.

What is the purpose of redox titration?

A redox titration (also called an oxidation-reduction titration) can accurately determine the concentration of an unknown analyte by measuring it against a standardized titrant. It is used for the analysis of organic analytes.

Is KMnO4 a secondary standard solution?

potassium dichromate is primary standard as it is highly soluble in aqueous medium and does dissociate in presence of sunlight.. whereas potassium permanganate is secondary standard as it gets precipitated and dissociated in presence of sunlight.

What is the primary purpose of standardizing the KMnO4 with a known mass of oxalic acid?

It means to determine the strength of potassium permanganate with a standard solution of oxalic acid. This reaction helps to study the oxidation and reduction theory.

What are the advantages of k2cr2o7 over KMnO4?

Potassium dichromate is a weaker oxidizing agent than KMnO4 or Ce(IV). However, it is a primary standard and its solutions have long lasting stability in acid and are stable to light, to most organic matter, and to chloride ion. It is always used in acid solutions.