Question

why should primary standard be of ready to use and available ?

Answer 1

Answer:

Here, a primary standard is typically a reagent which can be weighed easily, and which is so pure that its weight is truly representative of the number of moles of substance contained. ... High equivalent weight (to minimize weighing errors) Non-toxicity. Ready and cheap availability.

Answer 2

Answer:

Here, a primary standard is typically a reagent which can be weighed easily, and which is so pure that its weight is truly representative of the number of moles of substance contained. ... High equivalent weight (to minimize weighing errors) Non-toxicity. Ready and cheap availability.