How to identify one compound a lewis acid or lewis basr?

1.	How to identify one compound a lewis acid or lewis basr?
Answer» It is based on the bond between the atoms of the compounds in a given reaction. Eg: :NH3+BF3=NH3---->BF3 This is type of coordinate covalent bond where the lone pair of NH3 is equally shared by NH3 as well as BF3. We know that electrons acceptors are Lewis ACID and Lewis BASE are electrons.donor.Therefore in the above EQUATION, NH3 is a Lewis base and BF3 is a Lewis acid.

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