<Dl> <Dd> (O H −) = K w (H +) (\ displaystyle \ mathrm ((OH ^ (-))) = (\ frac (K_ (\ mathrm (w))) (\ mathrm ((H ^ (+)))))) </Dd> </Dl> <Dd> (O H −) = K w (H +) (\ displaystyle \ mathrm ((OH ^ (-))) = (\ frac (K_ (\ mathrm (w))) (\ mathrm ((H ^ (+)))))) </Dd> <P> Substitution of the expression for (OH) into the expression for K gives </P> <Dl> <Dd> K b = (H B +) K w (B) (H +) = K w K a (\ displaystyle K_ (\ mathrm (b)) = (\ frac ((\ mathrm (HB ^ (+))) K_ (\ mathrm (w))) (\ mathrm ((B) (H ^ (+))))) = (\ frac (K_ (\ mathrm (w))) (K_ (\ mathrm (a))))) </Dd> </Dl>

What is the relationship between h_ a h ​a ​​ and h_ b h ​b ​​ in the following compound