In many reactions the addition of AlCl3 produces the same effect as the addition of H+. (a)

Question:

In many reactions the addition of AlCl3 produces the same effect as the addition of H+.
(a) Draw a Lewis structure for AlCl3 in which no atoms carry formal charges, and determine its structure using the VSEPR method.
(b)What characteristic is notable about the structure in part (a) that helps us understand the acidic character of AlCl3?
(c) Predict the result of the reaction between AlCl3 and NH3 in a solvent that does not participate as a reactant.
(d) Which acid-base theory is most suitable for discussing the similarities between AlCl3 and H+?