Respuesta :
Balanced equations use the whole numbers to conserve the atomic numbers. When the reaction is balanced then 2 will be the coefficient in front of the Ag⁺.
What is a balanced reaction?
A balanced reaction has symbols and whole numbers that represent the number of atoms and molecules of the reactants and the products in a reaction mixture.
The reaction between mercury and silver is shown as:
Hg + 2Ag⁺ → 2Ag + Hg²⁺
This can be checked by the redox half-reactions as:
2Ag⁺ + 2e⁻ → 2Ag⁰
Hg⁰ → Hg²⁺ + 2e⁻
Therefore, the silver cation gained two-electron and became a silver atom.
Learn more about the balanced reaction here:
https://brainly.com/question/10429379
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