1 / 11

The Lewis Acid-Base Model

The General Approach. The Lewis Acid-Base Model. History. Arrhenius Definition: Limited but useful Definition is generalized by the introduction of the Brøwnsted-Lowry definition Even broader model suggested by G.N. Lewis in 1920s. Definitions.

lachance
Télécharger la présentation

The Lewis Acid-Base Model

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The General Approach The Lewis Acid-Base Model

  2. History • Arrhenius Definition: Limited but useful • Definition is generalized by the introduction of the Brøwnsted-Lowry definition • Even broader model suggested by G.N. Lewis in 1920s

  3. Definitions • Lewis Acid: an atom, ion, or molecule that accepts an electron pair in order to form a covalent bond Lewis Base: an atom, ion, or molecule that donates an electron pair in order to form a covalent bond

  4. What does it mean? • A Lewis acid has an empty electron orbital to accept more electrons(like H+) • A Lewis base(like OH-) has electrons which can be given to a Lewis acid, forming a Lewis adduct

  5. So wait… • Yes. Arrhenius acids and Brøwnstead-Lowry Acids are also Lewis acids! Woah!

  6. Why should I care? • Because, it means that rxns like this can count as acid-base reactions Even though they don’t count as them under other definitions

  7. So, to summarize… • Let’s compare the definitions!

  8. Arrhenius acid-base definition • Acid H+: producer • Base: OH- produce • Only works in water

  9. Brøwnsted-Lowry Definition • Acid: H+ Dono • Base: H+ acceptor

  10. Lewis model • Acid, Electron-Pair acceptor • Base, Electron-Pair donator

  11. And now you know!

More Related