User:GetLinkPrimitiveParams/Speciation (chemistry)

Speciation is the distribution of an element amongst defined chemical species in a system

Especially by ions, the most chemical elements can be present in different states. For example, water can be present as the liquid molecule H₂O, but also as ions H₃O⁺ and OH^-.

For ions, the distribution of these speciation can be predicted with the equilibrium constant (K). For pure water, this constant is:

$K=10^{-14}=[H_{3}O^{+}][OH^{-}]$

References

• Templeton, D.M. (2000) GUIDELINES FOR TERMS RELATED TO CHEMICAL SPECIATION AND FRACTIONATION OF ELEMENTS. DEFINITIONS,STRUCTURAL SPECTS,AND METHODOLOGICAL APPROACHES, Pure Apple Chem, vol.72 No.8, , pp 1453-1470