Answer:
Solid magnesium chloride is a non-conductor of electricity because the ions aren't free to move. However, it undergoes electrolysis when the ions become free on melting. Magnesium chloride dissolves in water to give a faintly acidic solution (pH = or 6).
The reactants are aluminum and iron nitrate.
Well, an independent variable ids the thing that stays the same and a dependent variable is the thing that changes.