Asample of solid albr3 contaminated with solid kf is melted and electrolyzed. what is the resulting overall reaction? correct! 2al3+(l) + 6br–(l) → 2al(s) + 3br2(l) no reaction will occur 2k+(l) + 2br–(l) → 2k(s) + br2(l) 2k+(l) + 2f–(l) → 2k(s) + f2(g) 2al3+(l) + 2f–(l) → 2al(s) + f2(g)

If you look at the substances, you could test by interchanging the metals and nonmetals of each other. With that being said, K will combine with Br, and Al will combine with F. So, the complete reaction would be: 

AlBr₃ (l) + KF (l) → AlF₃ (l) + KBr (l)

They won't appear as ions because they are not in the aqueous state. Only strong electrolytes dissolved in water dissociate into ions.

The answer is c) pyrite

And a) oxygen i believe