Question

Law of constant proportions

Answer 1

Answer:

▪︎According to this law, in a chemical substance (or compound), the elements are always present in definite proportions (or ratios) by mass.

▪︎eg. 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, carbon dioxide (CO,) always contains carbon and

oxygen in the ratio of 3:8. If a sample of CO, contains 36 g

of carbon then it is compulsory that the sample has 96 g oxygen.

_______✌

Answer 2

The law of constant proportions states that chemical compounds are made up of elements that are present in a fixed ratio by mass. This implies that any pure sample of a compound, no matter the source, will always consist of the same elements that are present in the same ratio by mass. For example, pure water will always contain hydrogen and oxygen in a fixed mass ratio (a gram of water consists of approximately 0.11 grams of hydrogen and 0.88 grams of oxygen, the ratio is 1:8).

_____________✌