. What is Law of Definite proportions


Best Answer

Law of Definite proportions

This law was given by, a French chemist, Joseph Proust. He stated that a given compound always contains exactly the same proportion of elements by weight.

Irrespective of the source, a given compound always contains same elements in the same proportion. The validity of this law has been confirmed by various experiments. It is sometimes also referred to as Law of definite composition. 

This law implies that irrespective of how a compound is prepared or from where the compound originates, it is always made up of the same elements combined in the same proportion by the weight.

For example, if water is taken from difference sources, such as rivers, oceans, wells etc. they all contain hydrogen and oxygen, combined in the same proportion by weight in it.

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