Chapter 11.3, Problem 26SP

Interpretation Introduction

Interpretation: To determine the ionic reaction and net ionic reaction.

Concept Introduction: An ion that can be found in a chemical equation as both a reactant and even a product is known as a spectator ion. A complete ionic equation also includes the spectator ions.

Answer to Problem 26SP

The ionic reaction is

  ${\text{3Ca}}^{\text{2+}}{\text{+6OH}}^{\text{-}}{\text{+2H}}_{\text{3}}{\text{PO}}_{\text{4}}\to {\text{Ca}}_{\text{3}}{{\text{(PO}}_{\text{4}}\text{)}}_{\text{2}}{\text{+12H}}_{\text{2}}\text{O}$

Explanation of Solution

When calcium hydroxide will react will phosphoric acid then it will form calcium phosphate and water. Its chemical reaction can be written as:

  ${\text{Ca(OH)}}_{\text{2}}{\text{+H}}_{\text{3}}{\text{PO}}_{\text{4}}\to {\text{Ca}}_{\text{3}}{{\text{(PO}}_{\text{4}}\text{)}}_{\text{2}}{\text{+H}}_{\text{2}}\text{O}$

Balanced chemical equation:

  ${\text{3Ca(OH)}}_{\text{2}}{\text{+2H}}_{\text{3}}{\text{PO}}_{\text{4}}\to {\text{Ca}}_{\text{3}}{{\text{(PO}}_{\text{4}}\text{)}}_{\text{2}}{\text{+6H}}_{\text{2}}\text{O}$

Complete the ionic equation and net ionic equation

  ${\text{3Ca}}^{\text{2+}}{\text{+6OH}}^{\text{-}}{\text{+2H}}_{\text{3}}{\text{PO}}_{\text{4}}\to {\text{Ca}}_{\text{3}}{{\text{(PO}}_{\text{4}}\text{)}}_{\text{2}}{\text{+6H}}_{\text{2}}\text{O}$

The complete ionic equation and the net ionic equation will be the same because this reaction does not have any spectator ion.