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Answer:
A qualitative correlation between the extent of interaction between various Lewis acids and bases has been achieved by classifying the acids or bases into two classes: hard and soft in his theory of Hard and Soft Acids and Bases – HSAB. Acid-base reactions are then treated by the general principle that hard acids prefer to combine with hard bases and soft acids prefer to combine with soft bases (and vice versa). The criterion of hardness (or softness) is ascribed to the “hardness” of the electron cloud associated with any species. A firmly held electron-cloud with low polarizability makes a species “hard”, while an easily polarizable electron cloud characterizes the species as “soft”. A third category with intermediate character appears in the borderline.
Based on this information, tell us your best guess.
The Bi-S bond has been relatively stronger than the Bi-N bonds, as Bi has been a hard acid, and it combines more strongly with a hard base that is S.
The HSAB concept has been the hard and soft acid and base concept. The concept has also been termed the Pearson acid and base concept.
According to the concept, hard acids preferred to combine with the hard bases, and soft acids prefer to be combined with the soft bases. The concept gives the idea of the stability of the compounds.
The hard acids are the low electronegative, small ionic radius elements, while soft acids are large ionic radius, high positive charge.
The hard bases are the elements with a small radius and high electronegativity, while soft bases are the elements with a large ionic radius and high polarizability.
The given elements have been:
- The Bi has been a hard acid.
- N has been a borderline base.
- S has been a hard base.
Since hard acid tends to bond with a hard base, Bi tends to bond more strongly with S than N. Thus, the Bi-S bond has been stronger than the Bi-N bond.
For more information about HSAB concept, refer to the link:
https://brainly.com/question/8030824
