Question

The information below describes a redox reaction.

Answer 1

3

Explanation:

The coefficient in the final, balanced equation for the reaction is 3.

Now let us look into the reaction:

  The half equations are;

  Ag⁺ +  e⁻ →  Ag   reduction half

  Al   →   Al³⁺  +  3e⁻ oxidation half

The reduction half, electron is taken in where as in the oxidation half, electron is lost.

  To derive the over all balanced equation;

             Ag⁺ +  e⁻ →  Ag     multiply by 3

           Al   →   Al³⁺  +  3e⁻   multiply by 1

This gives :

            3Ag⁺ +  3e⁻ →  3Ag

             Al   →   Al³⁺  +  3e⁻

Adding reactants together and products together:

              3Ag⁺ +  3e⁻  +  Al      →     3Ag   +  Al³⁺  +  3e⁻

Cancel out species that appears on both sides of the expression because they are spectators:

              3Ag⁺$_{aq}$   +  Al$_{s}$       →     3Ag$_{s}$    +  Al³⁺  $_{aq}$

We see that silver has a coefficient of 3 in the balanced expression.

learn more:

Ionic equation brainly.com/question/2947744

#learnwithBrainly