Question #bab14
1 Answer
May 22, 2015
A primary standard is a reagent that is stable, is extremely pure, has no water of hydration, and has a high molar mass.
Some primary standards are:
- sodium carbonate,
#"Na"_2"CO"_3# , for the titration of acids - potassium hydrogen phthalate (KHP),
#"KHC"_8"H"_4"O"_4# , for the titration of bases - potassium dichromate,
#"K"_2"Cr"_2"O"_7# , for redox titrations - sodium oxalate,
#"Na"_2"C"_2"O"_4# , for redox titrations
A standard solution is a solution with an accurately and precisely known concentration.
It is prepared by using a primary standard.
It is often used to determine the concentrations of other substances by titration.
For example, you might prepare a standard solution of KHP to determine the concentration of a solution of
