1). Are you sure that there's no additional reagent for the Friedel-Crafts reaction?
Please, take a second look.
2). For analytical indentification purpose, aqueous KMnO4 can work like that.
3). Friedel-Crafts reaction demands a strong Lewis acid catalysis. This one prefers AlCl3, the other one prefers Fecl3, another one might prefer something else as a Lewis acid catalyst, and so on.