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# How does the law of definite proportions apply to compounds?

Last updated date: 16th Jun 2024
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Hint: Giving to this law , every chemical compound holds a specific fixed and constant proportions (by mass) of its essential elements in the reaction.
This law statuses that a compound always comprises exactly the equal proportion of elements by mass.

This law of definite proportions is from time to time talked about as Proust's Law for the reason that it was in the beginning perceived by a French chemist named Joseph Proust. In the new world, this law appears obvious, but then again in Proust's day it was a new indication, because specific scientists thought that several combinations of elements could make convinced substances, instead of the substance requiring to be produced by a definite proportion.
This resource shows that the composition of a compound is not determined by its source or its process of research.
In water, e.g., the mass of O must continually have the equal ratio to the mass of H (mass ratio is $\;O:H{\text{ }} = {\text{ }}7.94:1$).
To tell uncertainty compounds containing the similar elements are the similar or different, we can define the proportions of their masses.
EXAMPLE-
Compound $\;1$ comprises $15.0{\text{ }}g$ of $\;H$ and $120.0{\text{ }}g$ of $O$. Compound $2$ comprises $2.00{\text{ }}g$ of $\;H$ and $32.0g$ of $O$. Are the compounds similar or different?
Solution-
Compound $\;1$: Mass ratio of $O:H = 120.0g:{\text{ }}15.0g = 8.00$
Compound $2$: Mass ratio of $O:H = 32.0g\;:{\text{ }}2.00g = 16.0$
The mass ratios are not the same. The compounds are dissimilar.

Note:
-This law of extents is a law of science that pronounces that a synthetic compound is ceaselessly imagined of the specific indistinguishable extent of components by mass. Along these lines, if a compound is made by joining $1/4$ from one chemical and the leftover $3/4$ from one more chemical, these proportions will continually hold true, irrespective of the amount of chemicals additional.
-Vinegar is an alternative common home item. Its chemical compound is ${C_2}{H_4}{O_2}$, implication that it is through of $2$ atoms of $C$, $4$ atoms of $\;H$, $2$ atoms of $O$. No other grouping of C, $\;H$, and $O$ could be combined to produce vinegar.
-The Law of Proportions confirms that chemical compounds are at all times created using the equal proportions, irrespective of the quantity of the compound which is being made.