undissociated

American  

[uhn-di-soh-shee-ey-tid, -see-ey-] / ˌʌn dɪˈsoʊ ʃiˌeɪ tɪd, -siˌeɪ- /

adjective

Chemistry.

1. not dissociated, especially into ions or into simpler molecules.

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Etymology

Origin of undissociated

First recorded in 1905–10; un- ¹ + dissociate ( def. ) + -ed ² ( def. ); dissociation ( def. 3 )

Example Sentences

Solid copper chloride is brown or yellow, so that its concentrated solution, which contains both ions and undissociated molecules, is green, but changes to blue as water is added and the ionization becomes complete.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" by Various

The molecular concentration of such a solution, with the corresponding constants, depends on the total number of these particles, i.e. the sum of the ions and the undissociated neutral molecules.

From The Mechanism of Life by Leduc, Stéphane

It is evident that the undissociated part of each acid must eventually be in equilibrium with the free hydrogen ions, and, if the concentrations are not such as to secure this condition, readjustment must occur.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" by Various

For instance, the colour of a salt solution is the colour obtained by the superposition of the colours of the ions and the colour of any undissociated salt that may be present.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" by Various

The result of this equilibrium is that quite a number of H+ ions from the water are converted into undissociated HCN molecules.

From An Elementary Study of Chemistry by McPherson, William