lewis acid and base!?

Question

In the equilibrium reaction shown in
HCl(g) + H2O(l) -> Cl^1- + H3O^1+, the Lewis acids are which of the following?
Cl1- and H2O
HCl and H2O
HCl and Cl1-
HCl and H3O1+
H2O and H3O1+
Cl1- and H3O1+

Answer 1

OK, first of all, those little numbers at the top right aren't exponents, they're charges, so you don't need to use the ^ symbol. It should be written "HCl(g) + H2O(l) -> Cl- + H3O+" or "HCl(g) + H2O(l) -> Cl-1 + H3O+1".

That aside, HCl and H3O+ are Lewis acids. In fact they're very strong acids by any definition.

Answer 2

Lewis acids are electron pair acceptors (conversely Lewis bases are electron pair acceptors)