LAW OF CHEMICAL COMBINATION

 


1.LAW OF CONSERVATION OF MASS:-

Matter can neither be created nor be destroyed as a result of any physical and chemical changes.

The total mass of reactant is equal to the mass of the product.

2.LAW OD DEFINITE PROPORTION/CONSTANT PROPORTION:-

According to the law, the chemical compoundare made up of elements that are present in a firx ratio by mass.

e.g-Hydrogen and oxygen in a fixed massed ratio are present in a pure water in the ration of 1:8.

3.LAW OF MULTIPLE PROPORTION:-

This was proposed by John Dalton.

According to this law of multiple proportion, it States that if two elements form more than one compounds,then the ratio of the masses of the second element which combines with a fixed mass of the first element will always be the ratio of small whole numbers.

4.LAW OF RECIPROCAL PROPORTION:-

This law states that if the two different elements combines separately with a fixed mass of third element, the ratio of the masses in which they combine with each other.

5.GAY-LUSSAC'S LAW OF GASEOUS VOLUME:-

This law states that the pressure of a given mass of the gas varies directly with the absolute temperature of the gas when the volume is kept constant.

Mathematically  -  p/t=k

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