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(of a molecule) not dissociated into oppositely charged ions.
- ‘However, if the acid is titrated against a dilute base, the undissociated molecules progressively dissociate and eventually the total hydrogen ion concentration can be found.’
- ‘At pH 8.9, it was a mixture of undissociated molecules, monoanion and dianion.’
- ‘Production of the weak acid nitrite and excretion of undissociated nitric acid may help to stabilize cytosolic pH.’
- ‘Some substances, such as weak acids or bases in their undissociated form, are soluble in lipids and will dissolve in the lipid bilayer of the cell membrane.’
- ‘Weak acids vary in strength from those which exist primarily as hydrated molecules and only ionize to a very small extent to those which ionize substantially and are in equilibrium with only a small amount of undissociated molecules.’
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The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.