normality= molarityxequivalent
Eg: H2SO4 + Na2OH ⇒ Na2SO4 + 2H2O
H2SO4 can neutralize 2 M of NaOH so equivalent of H2SO4 is 2 and that of NaOH is 1
For ions, equivalent is the number of charge and for acids or bases it is the acidity or basicity.
Equivalent weight is weight of 1 equivalent of any compound