What Are The Requisites For A Substance To Be A Primary Standard ? Me

1.	What Are The Requisites For A Substance To Be A Primary Standard ? Mention Its Examples.
Answer» The CRITERIA for a solution to be primary standard solution are as follows: It should be available in pure and dry STATE. Its composition should not be CHANGED on storage. i.e., It should not be toxic, volatile, hygroscopic and deliquescent. It should be highly soluble in WATER without any change in its composition. It should have higher molecular and equivalent weight. Some of the examples of primary standard solution are: Sodium carbonate (Na2CO3), Potassium DICHROMATE (K2Cr2O7), oxalic acid (COOH)2.2H2O, Mohr’s salt etc. The criteria for a solution to be primary standard solution are as follows: Some of the examples of primary standard solution are: Sodium carbonate (Na2CO3), Potassium dichromate (K2Cr2O7), oxalic acid (COOH)2.2H2O, Mohr’s salt etc.

What Are The Requisites For A Substance To Be A Primary Standard ? Mention Its Examples.

Answer»

The CRITERIA for a solution to be primary standard solution are as follows:

It should be available in pure and dry STATE.
Its composition should not be CHANGED on storage. i.e., It should not be toxic, volatile, hygroscopic and deliquescent.
It should be highly soluble in WATER without any change in its composition.
It should have higher molecular and equivalent weight.

Some of the examples of primary standard solution are:

Sodium carbonate (Na2CO3), Potassium DICHROMATE (K2Cr2O7), oxalic acid (COOH)2.2H2O, Mohr’s salt etc.

The criteria for a solution to be primary standard solution are as follows:

Some of the examples of primary standard solution are:

Sodium carbonate (Na2CO3), Potassium dichromate (K2Cr2O7), oxalic acid (COOH)2.2H2O, Mohr’s salt etc.