Concept Review Questions Chapter 4

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Concept Review Questions

Section 1

1. What is the definition of a Lewis acid and a Lewis base?

2. What is a Lewis acid-base adduct?

3. What is a dative bond?

4. A Lewis base is typically a molecule with an approximately non-bonding HOMO? Explain why.

5. A Lewis acid is typically a molecule with an approximately non-bonding LUMO. Explain why.

Section 2

1. What is meant by a “soft” and a “hard” atom?

2. What is the influence of donor atom size on the hardness of a base?

3. What is the influence of acceptor atom size on the hardness of an acid?

4. What is the influence of positive charge on the hardness of an acid?

5. What is the influence of negative charge on the hardness of a base?

6. Explain the concept of Pearson’s absolute hardness.

7. The CH₄ molecule does not make significant hydrogen bonding with Cl^-. Explain this using Lewis acid/base and molecular orbital theory arguments.

Dr. Kai Landskron (Lehigh University). If you like this textbook, please consider to make a donation to support the author's research at Lehigh University: Click Here to Donate.