Chapter 8, Problem 5A

Interpretation Introduction

Interpretation : The term strong electrolyte is to be defined with two examples.

Concept Introduction : A substance that dissolved in a solution and dissociate into cations and anions is defined as an electrolyte. These ions comprise the property of conducting electricity. The strength of an electrolyte relies upon its capacity to dissociate.

Answer to Problem 5A

A substance that dissolves completely into its ions is defined as strong electrolyte. For an example, copper (II) nitrate and potassium chromate.

Explanation of Solution

A substance that dissolves completely into its ions is defined as strong electrolyte.

The first example is as follows:

  $\text{Cu}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\stackrel{{\text{H}}_{\text{2}}\text{O}}{\to }{\text{Cu}}^{2+}\left(\text{aq}\right)+{\text{2NO}}_{\text{3}}{}^{-}\left(\text{aq}\right)$

Copper (II) nitrate is a strong electrolyte. The above equation show it’s completely ionizes to give ${\text{Cu}}^{\text{2+}}$ as a cation and ${\text{NO}}_{\text{3}}{}^{-}$ as an anion.

The second example is as follows:

  ${\text{K}}_2{\text{CrO}}_{\text{4}}\stackrel{{\text{H}}_{\text{2}}\text{O}}{\to }{\text{2K}}^{+}\left(\text{aq}\right)+{\text{2CrO}}_4{}^{2-}\left(\text{aq}\right)$

Potassium chromate is a strong electrolyte. The above equation show it’s completely ionizes to give ${\text{K}}^{\text{+}}$ as a cation and ${\text{CrO}}_4{}^{2-}$ as an anion.

Conclusion

A substance that dissolves completely into its ions is defined as strong electrolyte. For an example, copper (II) nitrate and potassium chromate.