cation exchange

cat·i·on ex·change

(kat'ī-on eks-chānj'), The process by which a cation in a liquid phase exchanges with another cation present as the counter ion of a negatively charged solid polymer (cation exchanger). A cation-exchange reaction in removal of the Na⁺ of a sodium chloride solution is RSO₃^-H⁺ + Na⁺ → RSO₃^-Na⁺ + H⁺ (R is the polymer, RSO₃^- is the cation exchanger); if this is combined with the anion-exchange reaction, NaCl is removed from the solution (desalting). Cation exchange may also be used chromatographically, to separate cations, and medicinally, to remove a cation, for example, H⁺, from gastric contents, or Na⁺ and K⁺ in the intestine. See: anion exchange.

cat·i·on ex·change

(kat'ī-on eks-chānj') The process by which a cation in a liquid phase exchanges with another cation present as the counter-ion of a negatively charged solid polymer (cation exchanger). Cation exchange may be used chromatographically, to separate cations, and medicinally, to remove a cation.
See also: anion exchange

cation exchange

The transfer of cations between those in a liquid medium and those in a solid polymer. The polymer is termed the cation exchanger. Cation exchange is used in ion-exchange chromatography and in certain water purifiers. See also: exchange

单词	cation exchange
释义	cation exchange cation exchange n. A chemical process in which cations are exchanged equally between a solid, such as zeolite, and a solution, such as water. The process is often used to soften water. cation exchange cation exchange [′kat‚ī·ən iks′chānj] (chemistry) A chemical reaction in which hydrated cations of a solid are exchanged, equivalent for equivalent, for cations of like charge in solution. cation exchange cat·i·on ex·change (kat'ī-on eks-chānj'), The process by which a cation in a liquid phase exchanges with another cation present as the counter ion of a negatively charged solid polymer (cation exchanger). A cation-exchange reaction in removal of the Na⁺ of a sodium chloride solution is RSO₃^-H⁺ + Na⁺ → RSO₃^-Na⁺ + H⁺ (R is the polymer, RSO₃^- is the cation exchanger); if this is combined with the anion-exchange reaction, NaCl is removed from the solution (desalting). Cation exchange may also be used chromatographically, to separate cations, and medicinally, to remove a cation, for example, H⁺, from gastric contents, or Na⁺ and K⁺ in the intestine. See: anion exchange. cat·i·on ex·change (kat'ī-on eks-chānj') The process by which a cation in a liquid phase exchanges with another cation present as the counter-ion of a negatively charged solid polymer (cation exchanger). Cation exchange may be used chromatographically, to separate cations, and medicinally, to remove a cation. See also: anion exchange cation exchange The transfer of cations between those in a liquid medium and those in a solid polymer. The polymer is termed the cation exchanger. Cation exchange is used in ion-exchange chromatography and in certain water purifiers. See also: exchange FinancialSeeexchangeAcronymsSeeCEXThesaurusSeeion exchange
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