Equivalent weight of sample

Equivalent weight of sample:

Elements	Symbol	Valence	Weight of molecules
Hydrogen	H	1	1
Chloride	Cl	1	35.5
Sodium	Na	1	23
Potassium	K	1	39.1
Calcium	Ca	2	40.1
Oxygen	O	2	16
Sulphur	S	2/4	32.2
Zinc	Zn	2	65.4
Magnesium	Mg	2	24.3
Carbon	C	4	12
Silicon	Si	4	28.1
Nitrogen	N	3/5	14
Manganese	Mn	7	54.9

Formula:

For Elements = Weight of elements /Number Molecules

Such as :  H₂SO₄ =[ 1*2+{32.2+(16*4)}] / (1*2)=98/2=48

                 Na₂CO₃=[23*2+{12+(16*3)}] / (1*2)=106/2=53

                 NaOH=(23+16+1) / 1 = 40

                 H₂O₂=(1*2+16*2)/2=34/2=16

                 HCL = (1+35.5)/1 = 36.5

                 KMnO₄ = {39.1+54.9+(16*4)} / 1 = 158

                CH₃-COOH = {12+(1*3)+12+16+16+1}/1 = 60

For Radicals : Weight of elements / Valence of radicals

Such as  :  CO₃ ={12+(16*3)} / 2 =  60/2 = 30

Radicals	Symbol	Valence
Nitrate	NO3	1
Nitrite	NO2	2
Hydroxyl	OH	1
Carbonate	CO3	1
Sulphate	SO4	2