[jtoy4eva]

We all know that compounds like aluminium chloride (AlCl3) or boron flourid is a lewis acid.

But why?

The explanation i could provide is that the Al is electron deficient and since a lewis acid is an electron acceptor, Al is able to accept electrons from a lone pair to form stability.

Isn't there other explanations?

One other thing that still bugs me is that... Al has 3 valence electrons and 3 chlorine have bonded with those 3 electrons, is that the reason that its 'electron deficient'?

[AWK]

What definition of Lewis acid says? The first part is OK

B and Al need octet of electrons, so far they have 6.