Question

How would you distinguish between a Lewis acid and a Lewis base?

Answer 1

Well, which is the electron pair donor....?

Explanation:

Well, which is the `"electron pair donor"`....? And this is conceived to be the `"Lewis-base"`, and the `"electron pair acceptor"` is conceived as the `"Lewis acid"`...

And typical `"Lewis acids"` are `BX_3`, `B_2H_6`, and `""^(-)C-=O^(+)`...and `"Lewis bases"` are `HO^-`, `AlX_3`, and `PR_3`, and `NH_3`...