Predict the products and write a net ionic reaction for the reaction of cadmium chloride and ammonium sulfide.
CdCl2(aq) + (NH4)2(aq) ==>CdS(s) + 2NH4Cl(aq)
Cd^+2(aq) + S^-2(aq) ==> CdS(s)
To predict the products and write a net ionic reaction for the reaction of cadmium chloride (CdCl2) and ammonium sulfide (NH4)2S), we need to determine the possible combinations of ions.
Cadmium chloride (CdCl2) dissociates into Cd2+ and 2 Cl- ions:
CdCl2(s) → Cd2+(aq) + 2 Cl-(aq)
Ammonium sulfide ((NH4)2S) dissociates into 2 NH4+ and S2- ions:
(NH4)2S(s) → 2 NH4+(aq) + S2-(aq)
Combining these ions, we can form a precipitate if cadmium combines with sulfide or an insoluble compound is formed:
Cd2+(aq) + S2-(aq) → CdS(s)
Writing the net ionic equation by eliminating the spectator ions (ions that do not participate in the reaction):
Cd2+(aq) + S2-(aq) → CdS(s)
Therefore, the net ionic equation for the reaction of cadmium chloride and ammonium sulfide is Cd2+(aq) + S2-(aq) → CdS(s).
To determine the products and write the net ionic reaction for the reaction between cadmium chloride (CdCl2) and ammonium sulfide (NH4)2S), we first need to know the stoichiometry of the reaction.
Cadmium chloride is an ionic compound consisting of cadmium ions (Cd2+) and chloride ions (Cl-). Ammonium sulfide is also an ionic compound, made up of ammonium ions (NH4+) and sulfide ions (S2-).
In the reaction, the cadmium ions will exchange places with the hydrogen ions in ammonium sulfide, resulting in the formation of cadmium sulfide (CdS) and ammonium chloride (NH4Cl).
The balanced molecular equation for the reaction can be written as follows:
CdCl2 + (NH4)2S → CdS + 2NH4Cl
To write the net ionic equation, we need to determine the dissociation of the ionic compounds in water. Both cadmium chloride and ammonium sulfide will dissociate completely in aqueous solution.
CdCl2 dissociates into Cd2+ and 2Cl- ions:
CdCl2 → Cd2+ + 2Cl-
(NH4)2S dissociates into 2NH4+ and S2- ions:
(NH4)2S → 2NH4+ + S2-
The complete ionic equation can be written as follows:
Cd2+ + 2Cl- + 2NH4+ + S2- → CdS + 2NH4+ + 2Cl-
As we can see, the 2NH4+ ions are present on both sides of the equation and can be canceled out. The net ionic equation is:
Cd2+ + S2- → CdS
Therefore, the net ionic reaction for the reaction between cadmium chloride and ammonium sulfide is:
Cd2+ + S2- → CdS