What are the properties and uses of phosphoric acid

[alias] orthophosphate ［molecular formula］h3po4 [properties] pure phosphoric acid is colorless rhombic crystals and becomes a viscous liquid. density 1.834g/cm3, melting point 42.35℃. when it reaches the boiling point of 213°c (loses ½ h2o), it generates pyrophosphoric acid; when heated to 300°c, it becomes metaphosphoric acid. easily deliquescent, soluble in water and ethanol. its acidity is…