Question:
Hard acids prefer to combine with
Hard acids prefer to combine with
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The HSAB principle can be summarized as "like prefers like": Hard-Hard and Soft-Soft combinations result in the most stable chemical products.
Updated On: May 1, 2026
- Soft bases
- Soft acids
- Hard acids
- Hard bases
- Salts
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The Correct Option is D
Solution and Explanation
Concept:
The HSAB (Hard and Soft Acids and Bases) principle states that stable complexes are formed through the interaction of like species.
Step 1: {Understand the HSAB preference rule.}
According to this principle, hard acids preferentially react with hard bases to form stable, primarily ionic bonds. Similarly, soft acids prefer to react with soft bases to form covalent bonds.
Step 2: {Identify the target combination for a hard acid.}
Because a hard acid is typically a small, high-charge-density cation, it seeks out a hard base, which is characterized by small size and low polarizability.
Step 3: {Select the correct classification.}
This matching ensures the most stable electronic and structural interaction between the two species. Therefore, hard acids combine with hard bases.
Step 1: {Understand the HSAB preference rule.}
According to this principle, hard acids preferentially react with hard bases to form stable, primarily ionic bonds. Similarly, soft acids prefer to react with soft bases to form covalent bonds.
Step 2: {Identify the target combination for a hard acid.}
Because a hard acid is typically a small, high-charge-density cation, it seeks out a hard base, which is characterized by small size and low polarizability.
Step 3: {Select the correct classification.}
This matching ensures the most stable electronic and structural interaction between the two species. Therefore, hard acids combine with hard bases.
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