Ammonium

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Ammonium
Ball-and-stick model of the ammonium cation
Space-filling model of the ammonium cation
Names
IUPAC name
Ammonium ion
Systematic IUPAC name
Azanium[1]
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
MeSH D000644
UNII
  • [NH4+]
Properties
NH+
4
Molar mass 18.04 g·mol−1
Acidity (pKa) 9.25
Conjugate base Ammonia
Structure
Tetrahedral
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Ammonium is an ion. It is an ammonia molecule, NH3, protonated (with a hydrogen ion added) to make NH4+. It bonds with negative ions such as chloride to make salts such as ammonium chloride. Ammonium is slightly reducing so it can react with strong oxidizing agents.

References[change | change source]

  1. International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSCIUPAC. ISBN 0-85404-438-8. pp. 71,105,314. Electronic version.

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