Define a Lewis acid and a Lewis base. What type of species can act as Lewis acids and Lewis bases?

Which is a Lewis base ?

Classify the following species into Lewis acid and Lewis base. And show how these act as Lewis acid/base : F^(-)

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid // base: a. overset(Θ)(O)H, b. F^(Θ), c. H^(o+), d. BCl_(3)

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid // base: a. overset(Θ)(O)H, b. F^(Θ), c. H^(o+), d. BCl_(3)

Ethers act as ul("Lewis acids.")

Why do boron halides act as Lewis acids ?

The best Lewis acid is

Consider the following species: CF_(4),GeH_(4),BCl_(3),AlBr_(3),H_(2)O,PH_(3),PCl_(5),CO_(2),CH_(4) and calculate value of (x-y)^(2) : Where, x: Total number of species which can act as only lewis acid. y: total number of species which can act as lewis acid as well as lewis base.

Consider the following species: CF_(4),GeH_(4),BCl_(3),AlBr_(3),H_(2)O,PH_(3),PCl_(5),CO_(2),CH_(4) and calculate value of (x-y)^(2) : Where, x: Total number of species which can act as only lewis acid. y: total number of species which can act as lewis acid as well as lewis base.

Which of the following species acts as a Lewis acid and also as a Lewis base ?