Which one of the following arrangements repre | vedclass

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(A) The proton affinity of a species is directly related to its basicity. $A$ stronger base has a higher proton affinity.To determine the order,we loo

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$I^{-} < F^{-} < HS^{-} < NH_2^-$

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(A) The proton affinity of a species is directly related to its basicity. $A$ stronger base has a higher proton affinity.To determine the order,we look at the strength of the corresponding conjugate acids: $HI$,$HF$,$H_2S$,and $NH_3$.The acidity order is $HI > HF > H_2S > NH_3$.The basicity (and thus proton affinity) of the conjugate bases is the inverse of the acidity of their conjugate acids.Therefore,the order of proton affinity is $I^{-} < F^{-} < HS^{-} < NH_2^{-}$.

Which one of the following arrangements represents the correct order of the proton affinity of the given species?

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