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# BASIC CHEMICAL LAW

Lavoisier

”The mass of matter before reaction is same the mass matter after reaction”

Example:

If a reaction:              A  +  B  –>  C  +  D

Mass before:               a        b        –        –

Reaction      :              x        y        c       d

Mass after   :          (a-x)  (b-y)     c       d

The mass before reaction is a + b

The mass after reaction is (a-x) + (b-y) + c + d

Then:

The mass of matter before reaction = the mass matter after reaction

a + b    =    (a-x) + (b-y) + c + d

Proust

Any compound have an constant comparison

Example :

• Carbon monoxide                 C : O = 3 : 4
• Carbon dioxide                     C : O = 3 : 8
• Calcium oxide                      Ca : O = 5 : 2
• Hydrogen peroxide              H : O = 1 : 16
• Water                                   H : O = 1 : 8
• Sulphur dioxide                    S : O = 3 : 2

Dalton

If two unsure to form two or more compound, if the mass of one composer unsure is same then the comparison of other unsure is an simple comparison

Example:

The compound of Nitrogen and oxygen is : N2O; NO; NO2.

The comparison of N in N2O; NO; NO2 is 2 : 1 : 1

The comparison of O in N2O; NO; NO2 is 1 : 1 : 2

If the comparison of N in N2O; NO; NO2 made to 1 : 1 : 1, then the comparison of O in N2O; NO; NO2 is ½ : 1 : 2

Gay Lussac

In the same temperature and same pressure, the volume of gases have comparison same the coefficient reaction

Example:

2H2 + O2 –> 2H2O

The volume comparison of H2 : O2 : H2O is 2 : 1 : 2, likes the coefficient, 2 : 1 : 2