Chemistry XII Content

Volumetric Analysis Formulae

  1. volumetric analysis formulae

This relation tells that the combining mass ratio of reactants is always in the ratio of their equivalent masses. This law is also termed as law of chemical equivalence.
2.             Atomic mass = eqv. Mass x valency
3.             G. eqv. / eqv. = Equivalent mass of substance expressed in grams is 1 g. eqv. Or 1 eqv.

volumetric analysis formulae

4. Eqv. Mass of a compound.


volumetric analysis formulae

Where basicity of acid is defined as the no. of H+ ­ions displaced or OHions combined per molecule of the acid.
eg. Eqv. Mass of H2SO4 = 98/2 = 49


volumetric analysis formulae

Where acidity of the base is defined as the no. of H+ ions combined or OHions displaced per molecule of the base.
eg. Eqv. Mass of Ca(OH)2 = 74/2 = 37

c. volumetric analysis formulae

eg. Eqv. Mass of Na2Co3 = 106/2 = 53

d. volumetric analysis formulae

eg. Eqv. Mass of CO3— ­= 60/2 = 30
Eqv. Mass of Na+ = 23/1 = 23
In the case of acid, base and salt, the eqv. Mass can be obtained by the summation of positive and negative radical.

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