Question

What is the Ionic Equation and Net Ionic Equation for BaCl2 + Al2(SO4)=> 3Ba(SO4) + 2AlCl3?

Answer 1

do you know which one is solid?

Answer 2

Look at your products. Here BaSO4 is a solid. You get this information from a table of solubilities. That means AlCl3 remains in the solution.
The ions which remain in the solution are the spectator ions and are not written in the net ionic equation.
Cross them out of the original equation and you will have your net ionic equation.

3 BaCl2 + Al2(SO4)3 ---> 3 BaSO4 (s) + 2 AlCl3

3 Ba 2+ (aq) + 3 SO4 2- (aq) ---> 3 BaSO4 (s)