. Explain the law of constant proportion in a simple way


Best Answer

Law of constant proportion states that a chemical compound constantly contains exactly the same proportion of elements by mass. For a given unique chemical emulsion, its essential number is same for any sample that exists. We all know the chemical formula of water is H2O. That's two Hydrogens and one Oxygen atom, which adds up to 18u.

Let us take one mole of water. Therefore, one mole of water will weight 18 grams.  So, weight of hydrogen in 18gms or 1 mole water is 2 grams and that of oxygen is 16 grams. This proportion is fixed. However, 8/9 of its mass will be oxygen and1/9 will be hydrogen, if we take some mass of water. This rate will nothing change for water. It doesn't matter if we take ocean water or stream water or lake water, this proportion is constant. The stoichiometric proportion of individual elements is constant for a given emulsion anyhow of whatever physical change we bring to it.

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