Answer:
Mg + 2Ag⁺ ⟶ Mg²⁺ +2Ag
Explanation:
1. Start with the skeleton equation.
Mg + Ag⁺ ⟶ Mg²⁺ + Ag
2. Separate it into two half reactions
Mg ⟶ Mg²⁺
Ag⁺ ⟶ Ag
3. Balance charge by adding electrons to the deficient side
Mg ⟶ Mg²⁺ + 2e⁻
Ag⁺ + e⁻ ⟶ Ag
4. Multiply each half-reaction by numbers to equalize the electrons transferred
1×[Mg ⟶ Mg²⁺ + 2e⁻]
2×[Ag⁺ + e⁻ ⟶ Ag]
5. Add the two half-reactions, cancelling species that occur on each side
Mg ⟶ Mg²⁺ + 2e⁻
2Ag⁺ + 2e⁻ ⟶ 2Ag
Mg + 2Ag⁺ ⟶ Mg²⁺ +2Ag
The equation is now balanced.
