Lewis acids and bases  [ENDORSED]

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Sydney Wu 2M
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Lewis acids and bases

Postby Sydney Wu 2M » Mon Oct 31, 2016 11:45 am

How can you determine whether or not an element is a Lewis acid or base? For instance, for AlCl3, is Al donating e-s to Cl so that Cl has a full octet, therefore making it a Lewis base?

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Re: Lewis acids and bases  [ENDORSED]

Postby Chem_Mod » Mon Oct 31, 2016 11:55 am

The question asks if Al in AlCl3 itself can act as a Lewis acid or base. Al in AlCl3 has no lone pairs to donate so it will act as a Lewis acid (electron pair acceptor). Think of its empty 3d orbitals that can accommodate electron pairs from Lewis bases.

Sydney Wu 2M
Posts: 50
Joined: Fri Jul 22, 2016 3:00 am

Re: Lewis acids and bases

Postby Sydney Wu 2M » Mon Oct 31, 2016 5:57 pm

I understand now, thank you!


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