A cetrain ion `B^(-)` has an Arrhenius constant for basic character (eq. constnat `2.8xx10^(-7)`). The equilibrium constant for Lowry-Bronsed basic character is:A. `2.8xx10^(-7)`B. `3.57xx10^(-8)`C. `3.57xx10^(8)`D. `2.8xx10^(7)`

A cetrain ion `B^(-)` has an Arrhenius constant for basic character (e

1.	A cetrain ion `B^(-)` has an Arrhenius constant for basic character (eq. constnat `2.8xx10^(-7)`). The equilibrium constant for Lowry-Bronsed basic character is:A. `2.8xx10^(-7)`B. `3.57xx10^(-8)`C. `3.57xx10^(8)`D. `2.8xx10^(7)`
Answer» Correct Answer - D `B^(-)underset("Bronsted base")(+H^(+))hArr HB, K_(b)=2.8xx10^(-7)` `= ([HB])/([B^(-)][H^(+)])` …..(i) `B^(-)underset("Arrhenius base")(+H_(2)O)hArr HB+OH^(-)`, `K_(a)= ([HB][OH^(-)])/([B^(-)])` ….(ii) By eqs. (i) and (ii), `(K_(a))/(K_(b))= ([HB][OH^(-)])/([B^(-)])xx([B^(-)][H^(+)])/([HB])` `= [H^(+)][OH^(-)]= K_(w)` .....(iii) `:. K_(b)= (K_(a))/(K_(w)) = (2.8xx10^(-7))/(10^(-14))=2.8xx10^(7)`

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A cetrain ion `B^(-)` has an Arrhenius constant for basic character (eq. constnat `2.8xx10^(-7)`). The equilibrium constant for Lowry-Bronsed basic character is:A. `2.8xx10^(-7)`B. `3.57xx10^(-8)`C. `3.57xx10^(8)`D. `2.8xx10^(7)`

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