1.

What is dissociation constant of a weak acid (K_(a)).

Answer»

Solution :DISSOCIATION constant of a weak ACID is the ratio of the product of molar CONCENTRATIONS of the products of ionisation to the molar CONCENTRATION of the un-ionised acid medium. For a reaction
`HA+H_(2)OhArrH_(3)O^(+)+A^(-)`
`K_(a)=([H_(3)O^(+)][A^(-)])/([HA])`.


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