Potassium Hydrogen Phthalate Density

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potassium hydrogen phthalate density is the mass of a material substance per unit volume. The density of a sample can be corrected for buoyancy by dividing the mass of the weighed sample by its volume. Buoyancy corrections are used to ensure that the measured value of a chemical substance is accurate, and they can also be helpful in identifying the underlying reasons for inaccurate results.

Potassium Hydrogen Phthalate (CAS No 877-24-7), also known as KHP or potassium acid phthalate, is an acidic salt compound that forms white powder, colorless solutions, and an ionic solid. It is the monopotassium salt of phthalic acid, and it is an important chemical for use in acid-base titrations.

It is recommended that this product be dissolved in water before using it as an acidimetric standard. Care must be taken to ensure that the weighing, transferring, and titration operations are carried out as precisely as possible during this process. To do so, add 5.100 +/- 0.003 g of the potassium hydrogen phthalate to be assayed to one of two identical titration flasks along with an equal weight of NIST SRM potassium hydrogen phthalate, which has been previously crushed in an agate or mullite mortar to about 100 mesh fineness, dried at 120 degC for 2 h, and cooled in a desiccator.

Potassium Hydrogen Phthalate is soluble in water and slightly soluble in alcohol. It is a primary standard for preparing volumetric alkali solutions and also serves as a buffer in pH determinations.