Chapter U5.17, Problem 5E

(a)

Interpretation Introduction

Interpretation:

Net ionic equations for the given reactions must be written.

Concept Introduction:

Net ionic equation is the representation of chemical equation in which common ions (spectator ions) are cancelled from reactant and product side.

Answer to Problem 5E

Net ionic equation is given below.

  ${\text{Zn(s)+Cu}}^{\text{2+}}\text{(aq)}\to {\text{Zn}}^{\text{2+}}\text{(aq)+Cu(s)}$

Explanation of Solution

Total ionic equation is given below:

  ${\text{Zn(s)+Cu}}^{\text{2+}}{\text{(aq)+2Cl}}^{\text{-}}\text{(aq)+2e}\to {\text{Zn}}^{\text{2+}}{\text{(aq)+2e+2Cl}}^{\text{-}}\text{(aq)+Cu(s)}\text{.}$

As shown in the total ionic equation there are 2Cl^-(aq) and 2e common to both reactant and product side.

Cancelling these species the net ionic equation is obtained which is shown below.

  ${\text{Zn(s)+Cu}}^{\text{2+}}{\text{(aq)=Zn}}^{\text{2+}}\text{(aq)+Cu(s)}\text{.}$

b)

Interpretation Introduction

Interpretation:

Net ionic equations for the given reactions must be written.

Concept Introduction:

Net ionic equation is the representation of chemical equation in which common ions (spectator ions) are cancelled from reactant and product side.

Answer to Problem 5E

Net ionic equation is given below.

  ${\text{Ba}}^{\text{2+}}{\text{(aq)+SO}}_{\text{4}}{{}^{\text{2}}}^{\text{-}}\text{(aq)}\to {\text{BaSO}}_{\text{4}}\text{(s)}\text{.}$

Explanation of Solution

Total ionic equation is given below.

  ${\text{Ba}}^{\text{2+}}{\text{(aq)+2NO}}_{\text{3}}{}^{\text{-}}{\text{(aq)+Cu}}^{\text{2+}}{\text{(aq)+SO}}_{\text{4}}{{}^{\text{2}}}^{\text{-}}\text{(aq)}\to {\text{BaSO}}_{\text{4}}{\text{(s)+Cu}}^{\text{2+}}{\text{(aq)+2NO}}_{\text{3}}{}^{\text{-}}\text{(aq)}\text{.}$

As shown in the total ionic equation there are 2NO₃- (aq) and Cu²+ (aq) common to both reactant and product side.

Cancelling these species the net ionic equation is obtained which is shown below.

  ${\text{Ba}}^{\text{2+}}{\text{(aq)+SO}}_{\text{4}}{{}^{\text{2}}}^{\text{-}}\text{(aq)}\to {\text{BaSO}}_{\text{4}}\text{(s)}\text{.}$