Practical Organic Chemistry

Question

Given below are two statements:

Statement I : Aqueous solution of K…Cr…O… is preferred as a primary standard in volumetric analysis over Na…Cr…O… aqueous solution.

Statement II : K…Cr…O… has a higher solubility in water than Na…Cr…O….

In the light of the above statements, choose the correct answer from the options given below:

Accepted Answer

Option A. Statement I: Potassium dichromate (K…Cr…O…) is indeed commonly used as a primary standard in volumetric (titrimetric) analysis. It is a powerful oxidizing agent and has a high equivalent weight. Furthermore, it is readily available, it can be obtained in a high state of purity, it is not hygroscopic, and its solutions are stable. However, the reason it is preferred over sodium dichromate (Na…Cr…O…) is not due to its solubility, but rather its stability and molar mass.

More on Practical Organic Chemistry

Practical Organic Chemistry

More on Practical Organic Chemistry