Question

BF3 and bcl3 Lewis acid why ​

Answer 1

Answer:

BCl3 is the stronger acid between the two. Lewis acid are electron acceptors. In BF3, athough the partial positive charge on B atom is more, the tendency to accept a lone pair is reduced because the fluorine atoms donate their own lone pair to the empty boron orbitals forming p(pi)-p(pi) back bonding.