Polyacid

A polyacid is a chemical compound which with the possibility of releasing several H+ ions in opposition to the monoacides which can release only one from them. This release of Proton S is done in a successive way. With each release of protons a single acid couple corresponds/bases and its pKa associated.

Example of reaction:

H3PO4 + OH- - > H2PO4- + H2O

H2PO4- + OH- - > HPO42- + H2O

HPO42- + OH- - > PO43- + H2O

Examples of polyacids

  • Diacids:
    • Acid sulphuric: H2SO4
    • Ion oxonium: H3O+
  • Triacid:
    • Acid phosphoric: Citric H3PO4
    • Acid: C6H8O7

See too

  • List of the acids

Related articles

  • Safety of the laboratories

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