Use the following steps to balance the redox reaction below:

Question

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

b. Multiply each half-reaction by the correct number, in order to balance charges for the two half-reactions.

c. Add the equations and simplify to get a balanced equation.

Answer 1

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Answer 2

Mg to Mg2+ loses 2 electrons
Au+ to Au gains one electron. So 2Au for each Mg

Mg yields Mg+ +2e
Au+ + e yields Au

so multiply the second equation by 2

Answer 3

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