Chapter 11, Problem 5STP

Interpretation Introduction

Interpretation: The net ionic equation for the formation of the precipitate is to be stated.

Concept Introduction : An aqueous solution is one in which water serves as the solvent. Chemical equations typically illustrate it by adding to the appropriate chemical formula.

Answer to Problem 5STP

The net ionic equation is ${\text{CO}}_{\text{3}}{}^{2-}\left(aq\right)+{\text{Ca}}^{2+}\left(aq\right)\to {\text{CaCO}}_3\left(s\right)$ .

Explanation of Solution

The content of dropper bottle P is calcium nitrate.

The content of dropper bottle Q is potassium carbonate.

The content of dropper bottle R is hydrochloric acid.

The reaction of calcium nitrate and potassium carbonate is given as follows:

  ${\text{K}}_{\text{2}}{\text{CO}}_{\text{3}}\left(aq\right)+\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)\to {\text{CaCO}}_3\left(s\right)+2{\text{KNO}}_3\left(aq\right)$

The ionic equation is given as:

  ${\text{2K}}^{+}\left(aq\right)+{\text{CO}}_{\text{3}}{}^{2-}\left(aq\right)+{\text{Ca}}^{2+}\left(aq\right)+2{\text{NO}}_{\text{3}}{}^{-}\left(aq\right)\to {\text{CaCO}}_3\left(s\right)+{\text{2K}}^{+}\left(aq\right)+2{\text{NO}}_{\text{3}}{}^{-}\left(aq\right)$

The ions present on both sides are known as spectators’ ions and these ions are excluded in net ionic equation. The balanced net ionic equation is given as:

  ${\text{CO}}_{\text{3}}{}^{2-}\left(aq\right)+{\text{Ca}}^{2+}\left(aq\right)\to {\text{CaCO}}_3\left(s\right)$