1. Specific Gravity of the substance.
2. Equivalent Weight of the substance.
3. Puirity of the substance.
For eg: Calculation of Hydrochloric Acid Normality:
Sp. Gravity of HCl = 1.18; Equivalent weight = 36.45; Purity of HCl = 35%
Specific Gravity of HCl x Purity of HCl x 1000
Normality of HCl = _____________________________________
Equivalent weight of HCl x 100
1.18 x 35 x 10
Normality of HCl = ______________________
36.45 x 1
1.18 x 35 x 10
Normality of HCl = ________________
36.45
Normality of HCl = 11.3 N
Calculation of Sulphuric Acid Normality:
Sp. Gravity of H2SO4 = 1.84 ; Equivalent weight = 49.04 ; Purity of H2SO4 = 98%
Specific Gravity of H2SO4 x Purity of H2SO4 x 1000
Normality of H2SO4 = _____________________________________
Equivalent weight of H2SO4 x 100
1.84 x 98 x 1000
Normality of H2SO4 = ______________________
49.04 x 100
Normality of H2SO4 = 36.8 N
Calculation of Nitric Acid Normality:
Sp. Gravity of H2SO4 = 1.42; Equivalent weight = 63; Purity of H2SO4 = 70%
Specific Gravity of HNO3 x Purity of HNO3 x 1000
Normality of HNO3 = _____________________________________
Equivalent weight of HNO3 x 100
1.42 x 70 x 1000
Normality of HNO3 = ______________________
63 x 100
Normality of Nitric Acd = 15.8 N
