‘If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and 89 grams of oxygen are always obtained’. Which chemical law is illustrated by this statement?

Question

&#x2018;If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and 89 grams of oxygen are always obtained&#x2019;. Which chemical law is illustrated by this statement?

Philoid · Accepted Answer

The above statement justifies the Law of constant proportions which was given by Joseph Proust in 1799. According to this law, “a chemical compound always contains same elements in definite proportion by mass and it does not depend on the source of compound.” This suggests that whatever be the source of water, it will always contain 1:8 ratio of Hydrogen and oxygen respectively.