Page 13 - Analytical Chemistry I E-book
P. 13
Examples of primary standard chemicals
Potassium hydrogen phthalate.
Benzoic acid. Primary standard acids
Constant-boiling point HCl.
Anhydrous sodium carbonate. Primary standard bases
Anhydrous potassium bicarbonate.
2ry standard solution: Is a solution that lacks one of characters of
primary standards.
Examples of 2ry standard chemicals:
Hydrochloric acid (volatile).
Sodium hydroxide (unstable).
Sodium thiosulphate (with variable no of H2O molecules)
