Question

How to bascity of any compound

Answer 1

Basicity is associated with acid; some may confused and they may think basicity is come from base directly, but it's solely related to acid not to base.

Basidity of an acid can be defined as the no. of ionizable* H+ ion (actually H3O+i.e.hydronium ion, bcz generally we do all these stuffs in aqueous medium and non-aqueous medium such as liq.NH3, BrF3, HF etc are not usual) present in one mole of an acid.

Or in other words basicity of an acid refers to the number of replaceable hydrogen atom(s)# per molecule of an acid. So, it can also be referred as the no. of H+ ion(s) liberated in aqueous solution by one molecule of an acid or the no. mole(s) of H+ ions liberated in aqueous solution by one mole of an acid.