| ion exchange n. A reversible chemical reaction between an insoluble solid and a solution during which ions may be interchanged, used in water softening and in the separation of radioactive isotopes. |
ion exchange
n
(Chemistry) the process in which ions are exchanged between a solution and an insoluble solid, usually a resin. It is used to soften water, to separate radioactive isotopes, and to purify certain industrial chemicals
| ion exchange A reversible chemical reaction between two substances (usually a relatively insoluble solid and a solution) during which ions of equal charge may be interchanged. Ion exchange is used in water softening and purification, chemical analysis, the separation of radioactive isotopes, and kidney dialysis.  Cation exchange is the exchange of positively charged ions. Anion exchange is the exchange of negatively charged ions. |
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| Noun | 1. |  ion exchange - a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processingnatural action, natural process, action, activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity" |
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