Chapter U5, Problem 12RE

Interpretation Introduction

Interpretation: A balanced chemical equation for a redox reaction needs to be written.

Concept introduction: Chemical equation is the symbolic description of a chemical reaction that products and reactants are indicating in terms of their chemical formula.

Answer to Problem 12RE

The balance redox equation is as follows:

  $\text{2Fe}{\left({\text{NO}}_{\text{3}}\right)}_3\left(aq\right)+3\text{Zn}\left(s\right)\to 2\text{Fe}\left(s\right)+3\text{Zn}{\left({\text{NO}}_{\text{3}}\right)}_2\left(aq\right)$

Explanation of Solution

A redox reaction is as follows:

  $\text{Fe}{\left({\text{NO}}_{\text{3}}\right)}_3\left(aq\right)+\text{Zn}\left(s\right)\to \text{Fe}\left(s\right)+\text{Zn}{\left({\text{NO}}_{\text{3}}\right)}_2\left(aq\right)$

From this redox reaction ${\text{Fe}}^{\text{3+}}$ is reduced and Zn is oxidized.

Now balance the above equation is as follows:

  $\text{2Fe}{\left({\text{NO}}_{\text{3}}\right)}_3\left(aq\right)+3\text{Zn}\left(s\right)\to 2\text{Fe}\left(s\right)+3\text{Zn}{\left({\text{NO}}_{\text{3}}\right)}_2\left(aq\right)$

Conclusion

A reaction in which electrons are transferred from one reactant to another is termed as redox reaction.