Answer to Question #122229 in General Chemistry for Kadin Johnson

Question #122229
Calculate Kb for the conjugate base of carbonic acid, H₂CO₃(aq), Ka = 4.4x10⁻⁷
1
Expert's answer
2020-06-15T14:41:27-0400

The value of base ionisation constant KbKb is calculated using the following formula,

Kb=KwKawhere,Kb=\dfrac{Kw}{Ka} where,

KaKa is the acid dissociation constant

KwKw is water dissociation constant

We are given,

Ka=Ka= 4.41074.4*10^{-7}

Kw=1.01014Kw=1.0*10^{-14}

Substituting

Kb=1.010144.4107Kb=\dfrac{1.0*10^{-14}}{4.4*10^{-7}}


=2.3108=2.3*10^{-8}

KbKb for conjugate base of carbonic acid=2.3108=2.3*10^{-8}



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