self-ionizationn.

Brit.

/ˌsɛlfˌʌɪənʌɪˈzeɪʃn/, U.S.

/ˌsɛlfˌaɪənəˈzeɪʃ(ə)n/,

/ˌsɛlfˌaɪəˌnaɪˈzeɪʃ(ə)n/

Forms: see self- prefix and ionization n.²

Origin: Formed within English, by derivation. Etymons: self- prefix, ionization n.²

Etymology: < self- prefix + ionization n.²

Chemistry.

The process whereby a proportion of the molecules of a liquid compound interact with each other to form positive and negative ions; the extent to which this occurs. Cf. self-dissociation n. 2.

ΚΠ

1903 Proc. Royal Soc. 1902–3 71 52 Hydrogen chloride is known to be of itself a non-electrolyte, and to possess no power of self-ionisation.

1931 Chem. Rev. 8 201 Bishop..used the hydrogen electrode for titrations in ethanol and emphasized the effect of the low self-ionization of the solvent on the titration curves.

1972 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 3) v. 181 Pure H₂SO₄ shows extensive self-ionization resulting in high conductivity.

2013 R. Smith et al. Introd. Supercritical Fluids iv. 221 Water's self-ionization is due to the following reaction in which one water molecule donates a proton to another water molecule to form a hydronium ion.

This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).

单词	self-ionization
释义	self-ionizationn. Brit. /ˌsɛlfˌʌɪənʌɪˈzeɪʃn/, U.S. /ˌsɛlfˌaɪənəˈzeɪʃ(ə)n/, /ˌsɛlfˌaɪəˌnaɪˈzeɪʃ(ə)n/ Forms: see self- prefix and ionization n.² Origin: Formed within English, by derivation. Etymons: self- prefix, ionization n.² Etymology: < self- prefix + ionization n.² Chemistry. The process whereby a proportion of the molecules of a liquid compound interact with each other to form positive and negative ions; the extent to which this occurs. Cf. self-dissociation n. 2. ΚΠ 1903 Proc. Royal Soc. 1902–3 71 52 Hydrogen chloride is known to be of itself a non-electrolyte, and to possess no power of self-ionisation. 1931 Chem. Rev. 8 201 Bishop..used the hydrogen electrode for titrations in ethanol and emphasized the effect of the low self-ionization of the solvent on the titration curves. 1972 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 3) v. 181 Pure H₂SO₄ shows extensive self-ionization resulting in high conductivity. 2013 R. Smith et al. Introd. Supercritical Fluids iv. 221 Water's self-ionization is due to the following reaction in which one water molecule donates a proton to another water molecule to form a hydronium ion. This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022). < n.1903
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