Why Potassium Dichromate(K2Cr2O7) is a primary Standard?

Question

Accepted Answer

Potassium Dichromate is a primary standard due to its high purity, stability, and ability to be accurately weighed.

Potassium Dichromate has a high molar mass and is stable in air, making it a reliable substance for standardization.
It can be accurately weighed and dissolved in water to form a solution of known concentration.
It is also highly soluble in water, allowing for precise dilution.
Potassium Dichromate is used as a primary standard in the calibration of analytical instruments and in the determination of the concentration of other substances.
It is also used as an oxidizing agent in various chemical reactions.