Question

Explain the difference between the law of definite proportions and the law of multiple proportions.

Answer 1

The difference between the law of definite proportions and the law of multiple proportions is -

• The same compound appears in two or more samples, regardless of source.
• The Law of Multiple Proportions states that two different compounds containing the same element have been related by one gram (small # whole ratio).

What is law of chemistry?

To explain the properties as well as structure of atoms and molecules, a number of laws & theories have been proposed. These laws were based on presumptions and had limitations, but they served as the foundation for modern theory.

Now, according to the question;

• According to the law of multiple proportions, "if two elements combine to form a number of molecule or compounds, then the mass ratio of the second element which combines with the initial element would then always be in a fixed ratio of whole numbers."

• According to the law of definite proportions, "every chemical compound has a fixed proportion of the elements."

The examples demonstrate the distinction between the two laws.

• In a 1:1 ratio, the molecule HCl is made up of two elements: hydrogen and chlorine. It will always be the same regardless of the concentration of the HCl solution, the amount, or the source of its preparation. The law of definite proportions explains this.
• However, two elements can combine in a variety of ways, such as CO and CO₂, which are the same element but combine in a different way to form completely distinct molecules. The law of multiple proportions is used in this case.

To know more about the law of multiple proportions, here

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