law of multiple proportions(redirected from Law of chemical combinations)
Also found in: Dictionary, Thesaurus.
law of re·cip·ro·cal pro·por·tions
the relative weights in which two substances form a chemical union singly with a third are the same as, or simple multiples of, those in which they unite with each other; a corollary of the law of definite proportions.
Synonym(s): law of multiple proportions
law of multiple proportions
When two substances unite to form a series of chemical compounds, the proportions in which they unite are simple multiples of one another or of one common proportion.See: Dalton's law
See also: law