Question

what are primary standard reagents give example​

Answer 1

Answer:

A primary standard is a reagent for which we can dispense an accurately known amount of analyte. For example, a 0.1250-g sample of K2Cr2O7 contains 4.249 × 10–4 moles of K2Cr2O7. If we place this sample in a 250-mL volumetric flask and dilute to volume, the concentration of the resulting solution is 1.700 × 10–3 M.