Define :-
law of constan composition and law of multiple proportion.
Answers
Law of constant composition
This law deals with the composition of various elements present in a compound. This law was stated by French chemist Lewis Proust. This law states that "A pure chemical compound always contains same elements combined together in the same definite proportions by weight." The converse of this law is not true.
example :- it is found by the analysis of water (taken from various places like river. Falls and wells) that in each sample of water the ratio of hydrogen and oxygen is 2:16 or 1:8.
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Law of multiple proportion
This law was proposed by Dalton (1803). This law state that "When two elements combine to form two or more compounds then in two compounds the weights of one of the element which combine with a fixed weight of the other, bear a simple whole number ratio."
example :- carbon and oxygen react with each other to form carbon monoxide and carbon dioxide. Carbon monoxide (CO) contain 12 parts by weight of carbon and 16 parts by weight of oxygen and carbon dioxide (CO2) contains 12 parts by weight of carbon and 32 parts by weight of oxygen and ratio of the weights of oxygen which react with or fixed weight of carbon (12 parts) in these oxides is 16:32 which is a simple whole number ratio (1 : 2). Other examples of law and of multiple proportions
(i) H.O and H2O2
(ii) CuO and Cu,O
(ii) N,O, NO N2O3 and N2O.
Explanation:
Law of multiple proportions, also known as Dalton s Law, states that when one element combines with another to form more than one compound, the mass rations of the elements in the compounds are simple whole numbers of each other. This segment let's discuss the law of definite and multiple proportions.
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