Respuesta :
Potassium hydrogen phthalate is primary standard.
When standardizing a strong base titrant, the potassium hydrogen phthalate, or KHP, is frequently utilized as the principal standard.
The most typical application of phenolphthalein indicator occurs in titrations where KHP is employed as such an acidimetric standard to also standardize base solution.
An exceedingly pure, stable, devoid of water or hydration, high molecular weight reagent is just a fundamental standard. Sodium carbonate, potassium hydrogen iodate, potassium dichromate, oxalic acid, and various others are some primary standards.
Therefore, Potassium hydrogen phthalate is primary standard.
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