Ostwald's theory of indicators

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Noun

1.

Ostwald's theory of indicators - (chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociation theory of indicators scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable" chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions