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  1. Oxford Dictionary

    ion exchange

    • n.
      the exchange of ions of the same charge between an insoluble solid and a solution in contact with it, used in water-softening and other purification and separation processes.

    • noun: ion exchange

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    ion exchange

    • IPA[ˌīən iksˈCHānj]

    美式

    • n.
      the exchange of ions of the same charge between an insoluble solid and a solution in contact ...

    Oxford American Dictionary