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.

---

Etymology

Origin of undissociated

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

Example Sentences

In other cases, such as that of litmus, both the ion and the undissociated molecule are coloured, but in different ways.

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

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

In other words, there is always a definite and constant ratio between the product of the concentrations of the ions and the concentration of the undissociated acid when conditions of equilibrium prevail.

From An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes by Talbot, Henry P.

But since water is almost entirely undissociated, equilibrium can only be reached when there are very few hydroxyl or hydrogen ions present.

From An Elementary Study of Chemistry by McPherson, William

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