When is the product a compound and when is it 2 ions in these reactions?
While FeCl3 is a possible product, the reaction in A is aqueous. Wikipedia shows that is readily dissolves in water (92 g/100 mL @ 20C). The products exist as ions, and are written as such. 

I would suspect you're not supposed to have solubility constants memorized though, so in general if it is in water they will exist as ions. 

B is a gaseous reaction and the product is a compound, not an ion set like A.