Question

How can we find equivalent weight of given acid

Answer 1

An acid contains hydrogen atoms and supplies H+ ions. So equivalent mass/weight of an acid is defined as the molecular mass or weight divided by the number of moles of H+ ions that one mole of acid supplies in a solution.

For example:   Molecular mass of H Cl = 36.5 
                        num of moles of protons it supplies = 1
    => equivalent weight of H Cl = 36.5/1 = 36.5

Sulphuric acid H2 SO4 : molecular mass = 98
             number of moles of protons = 2
       => equivalent mass = 49.

Answer 2

molecular mass or weight divided by the number of moles of H+ ions in one mole