cation
Noun
Meaning
An electro-positive substance, which in electro-decomposition is evolved at the cathode; -- opposed to anion.
Source: Webster's dictionarySynonyms
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A cation can be a conjugate acid, and an anion can be a conjugate base, depending on which substance is involved and which acid–base theory is the viewpoint.
A hydroxide attached to a strongly electropositive center may itself ionize, liberating a hydrogen cation (H + ), making the parent compound an acid.
Another common instance where precipitation occurs is when a metal cation interacts with an anionic ligand to form an electrically neutral complex.
An ion is an atom (or group of atoms) that has lost one or more electrons, giving it a net positive charge (cation), or that has gained one or more electrons, giving it a net negative charge (anion).
Buffering occurs by cation exchange and neutralisation.
Calcium chemistry is almost exclusively that of Ca 2+ salts. citation Ca 2+ is a " hard cation ", that is, it characteristically favors oxide ligands.