Chapter F, Problem I.3AST

Interpretation Introduction

Interpretation:

Precipitate that forms has to be identified if aqueous solutions of ammonium sulfide and copper(II) sulfate are mixed.  Also the net ionic equation has to be written.

Concept Introduction:

Soluble compounds:

• Compounds of the elements from Group 1 are soluble.
• Ammonium compounds, chlorides, bromides, iodides are soluble except for the cation being ${\text{Ag}}^{\text{+}}$, ${\text{Hg}}_{\text{2}}{}^{\text{2+}}$, and ${\text{Pb}}^{\text{2+}}$.
• Nitrates, acetates, chlorates, and also perchlorates are soluble except for the cation being ${\text{Ca}}^{\text{2+}}$, ${\text{Sr}}^{\text{2+}}$, ${\text{Ba}}^{\text{2+}}$, ${\text{Pb}}^{\text{2+}}$, ${\text{Hg}}_{\text{2}}{}^{\text{2+}}$, and ${\text{Ag}}^{\text{+}}$.

Insoluble compounds:

• Chromates, carbonates, oxalates, and phosphates are insoluble except for the elements of Group 1 and ammonium ion.
• Sulfides are insoluble except for the elements from Group 1 and 2 and also for ammonium ion.
• Hydroxides and oxides are insoluble except for the elements from Group 1 and 2.

Complete ionic equation is the one that shows all the species that is present in the chemical reaction.  The dissolved ionic compounds are alone showed as ions.  Precipitates are not showed as ions.

Net ionic equation is the one that is obtained from the complete ionic equation by cancelling out the spectator ions.