Use the following steps to balance the redox reaction below:
Mg + Au* → Mg²+ + Au
a. Write the oxidation and reduction half-reactions. Make sure each half-reaction is balanced for number of atoms and charge. (3 points)
b. Multiply each half-reaction by the correct number, in order to balance charges for the two half-reactions. (1 point)
c. Add the equations and simplify to get a balanced equation.