A piece of aluminum is suspended in an aqueous solution containing $1MC{r}^{3+}$ and $1MA{l}^{3+}$

ions.

a$)$ What is the net EMF of the electrochemical process that results in the corrosion of the

aluminum?

b$)$ Will the aluminum corrode spontaneously in this environment?

c$)$ What would the concentration of $C{r}^{3+}$ need to be to cause the net EMF to become $1$

Volt?