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Monohydrogen phosphate

Chemical compound From Wikipedia, the free encyclopedia

Monohydrogen phosphate
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Hydrogen phosphate or monohydrogen phosphate (systematic name) is the inorganic ion with the formula [HPO4]2-. Its formula can also be written as [PO3(OH)]2-. Together with dihydrogen phosphate, hydrogenphosphate occurs widely in natural systems. Their salts are used in fertilizers and in cooking.[1] Most hydrogenphosphate salts are colorless, water soluble, and nontoxic.

Quick Facts Names, Identifiers ...

It is a conjugate acid of phosphate [PO4]3- and a conjugate base of dihydrogen phosphate [H2PO4].

It is formed when a pyrophosphate anion [P
2
O
7
]4−
reacts with water H
2
O
by hydrolysis, which can give hydrogenphosphate:

[P
2
O
7
]4−
+ H2O 2 [HPO
4
]2−
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Acid-base equilibria

Hydrogenphosphate is an intermediate in the multistep conversion of phosphoric acid to phosphate:

More information Equilibrium, Dissociation constant, pKa ...
  1. Values are at 25 °C and 0 ionic strength.

Examples

References

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