Question

Proust worked with 2 samples of cupric carbonate to explain which law of chemistry combinations ?
a) law of conservation of mass
b) law of definite proportion.
c) avogadro's law
d) dalton's law​

Answer 1

Answer:

b) LAW OF CONSTANT OR DEFINITE PROPORTION

Explanation:

chemistry, the law of definite proportion, sometimes called Proust's law, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

Answer 2

Answer:

The correct option is b) law of definite proportion.

Explanation:

Law of Definite Proportion: This law states that all chemical compounds are made up of elements that are present in a fixed ratio by mass. It is also known as Proust's law of definite proportions.

Proust worked with the two samples of cupric carbonate, one of which was of natural origin and the other was a synthetic one (prepared in lab). He found that, the composition of elements present in it was same for both the samples as shown below.

Sample                               % of Cu                  % of $O_2$                % of C

Natural sample                     51.35                       9.74                    38.91

Synthetic sample                  51.35                       9.74                    38.91

Clearly, we can see that proportions of elements are same for both the samples.

Hence, confirms the law of definite proportions.

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