Potassium phosphate, also known as potassium phosphate monobasic or potassium bisphosphate is a salt used as fertilizer and also food additive.

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Formula and structure: Although there are number of potassium phosphate salts that differ according come the setup and number of ions of each one, in this write-up will be take into consideration the potassium phosphate monobasic. The potassium phosphate monobasic chemistry formula is KH2PO4. The molar massive is 136.086 g/mol. This molecule is formed by one cation K+ and also one biphosphate anion H2PO4-. The structure varies through the temperature; in ~ room temperature the framework is orthorhombic, while at high temperature the is monoclinic. Its chemical structure deserve to be composed as below, in the usual representations supplied for organic molecules.


Occurrence: Potassium phosphate can be discovered in the living organisms as being component of some biochemical pathways and it can likewise be found in ores and also minerals.

Preparation: Potassium phosphate is developed through the reaction of phosphoric acid and also potassium carbonate, with the reaction:

H3PO4 + K3CO2 → KH2PO4 + CO2

It can also be developed by using potassium hydroxide or chloride instead of potassium carbonate.

Physical properties: Potassium phosphate is a white, odorless and deliquescent powder. The thickness of this salt is 2.33 g/L. Its melting allude is 252.6 °C and the boiling point is 400 °C. Potassium phosphate is very soluble in warm water, although it is also soluble in cold water yet the price is smaller. It is likewise slightly dissolve in ethanol.

Chemical properties: Potassium phosphate exhibits interesting electric properties. The compound is ferroelectric listed below -150 °C, an interpretation that the molecule has actually a spontaneous electrical polarization that can be provided in stimulate to get conductors and piezoelectric materials.

Uses: Potassium phosphate is used in the laboratories, pharmaceutical and food sectors as buffering agents. The buffers ready with potassium phosphate have actually the advantage of getting to the physiological pH 7.4. That is also used together emulsifying salt for production of cheese and meat. Potassium phosphate is additionally used together a fertilizer and due come its chemistry properties can be supplied in the manufacturing of piezoelectric materials.

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Health impacts / security hazards: Potassium phosphate is dangerous because that ingestion in big quantities. That is not combustible, although when heated, have the right to emit toxic fumes.