Phosphoric Acid And Orthophosphoric Acid

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Phosphoric acid

Phosphoric acid and orthophosphoric acid:

Chemical formula

H3PO4

CAS login number

7664-38-2

Melting point

42 ℃

Water solubility

Can dissolve with water in any ratio

Appearance

White solid, colorless viscous liquid above 42 ℃

Dangerous goods transportation number

UN 3453 8/PG 3

Freezing point

21℃

Generate

Phosphorus pentoxide dissolved in hot water to produce

Odor

No irritating odor

Phosphoric acid and orthophosphoric acid Study:

The earliest chemist to study phosphoric acid was French chemist Lavoisier. In 1772, he conducted an experiment by placing phosphorus in a mercury sealed bell to ignite it. The conclusion drawn from the experimental results is that a certain amount of phosphorus can be burned in a certain capacity of air; White flakes of anhydrous phosphorus are generated during phosphorus combustion, like fine snow; After combustion, the air in the bottle remains about 80% of its original capacity; After phosphorus combustion, it is about 2.5 times heavier than before combustion; White powder is dissolved in water to form phosphoric acid. Lavoisier also proved that phosphoric acid can be produced by reacting concentrated nitric acid with phosphorus.

About a hundred years later, German chemist Libich conducted many experiments in agricultural chemistry, uncovering the value of phosphorus and phosphoric acid for plant life. In 1840, Li Bixi's book "The Role of Organic Chemistry in Agriculture and Physiology" scientifically demonstrated the issue of soil fertility and pointed out the effect of phosphorus on plants. At the same time, he further explored the application of phosphoric acid and phosphate as fertilizers, ushering in the era of large-scale production of phosphoric acid.

Phosphoric acid and orthophosphoric acid use:

It is one of the food additives, used as a souring agent and yeast nutrient in food. Cola contains phosphoric acid. Phosphates are also important food additives and can serve as nutritional enhancers.

It can be used to produce phosphorus containing drugs, such as sodium glycerophosphate.

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