Question

state the law of definite proportion explain with an example

Answer 1

Answer:

The Law of Definite Proportions states that a chemical compound will always have the same proportions or amount of each element by weight, no matter what the amount is, or source. For instance, a 50-gram sample of carbon monoxide will have 21.5 g of carbon and 28.5 g of oxygen.

Answer 2

Answer:

The law of definite proportions or the law of constant proportions states that, In a chemical substance the elements are always present in definite proportions by mass. For example in water, the ratio of the mass of hydrogen and the mass of oxygen is always 1:8, whatever the source of water.

Additional points:-

• Lavoisier, along with other scientists, noted that many compounds were composed of two or more elements and each such compound had the same elements in the same proportions, irrespective of where the compound came from or who prepared it.
• In a compound such as water, the ratio of the mass of hydrogen to the mass of oxygen is always 1:8, whatever the source of water. Thus, if 9 g of water is decomposed, 1 g of hydrogen and 8 g of oxygen are always obtained.
• Similarly in ammonia, nitrogen and hydrogen are always present in the ratio 14:3 by mass, whatever the method or the source from which it is obtained.
• This led to the law of constant proportions which is also known as the law of definite proportions.