https://doi.org/10.1351/goldbook.H02725
The colour change which occurs on addition of
acid
(or
base
, or a
salt
) to a solution of a compound. A
chemical reaction
(e.g. ion formation) transforms a colourless compound into a coloured one.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1119 [Terms] [Paper]