The molecular formula of sulfuric acid is H2S 4 .
Its molecular mass is = (1 × 3) + 3 2 + (1 6 × 4)
= 2 + 32 + 64 = 98 u
The expression for the equivalent weight of an acid is
Equivalent weight = Molecular mass/ Number of replaceable hydrogen present
sulphuric acid contains two replaceable hydrogen. Substitute values in the above expression.
Equivalent weight = 98/2 = 49u
