Question

state and proof the law of chemical of combination
i want exact answer fir my test pls​

Answer 1

Explanation:

Law of Chemical Combination

Law of Conservation of Mass

• In a chemical change, total mass remains conserved. i.e. mass before the reaction is equal to mass after the reaction H2(g)+Cl2(g)⟶2HCl
• Mass before reaction=2+71=73g
• Mass after reaction=2x36.5=73g

Law of constant or Definite Proportions

• All Chemical compounds are found to have constant composition irrespective of their method of preparation or source.
• For g. in water (H2O), hydrogen and oxygen combine in 2:1 molar ratio, this ratio remains constant whether it is tap water or river water.

Law of Multiple Proportions

• When one element combines with the other elements to form two or more different compounds, the mass of one element which combines with a constant mass of the other, bear a simple ratio to one another.
• For eg. C and O2 reacts together to form CO and CO2. Here, fixed mass of carbon (12g) reacting with different masses of oxygen (16g and 32g) . Therefore, ratio of the masses of oxygen has ratio 16:32 or 1:2