Stat! when aqueous solutions of cadmium chloride and sodium sulfide are mixed, a precipitate of cadmium sulfide forms, leaving soluble sodium chloride in
the solution. include states in your answer.
write the molecular equation for the reaction.
write the ionic equation for the reaction.
write the net ionic equation for the reaction.

When aqueous solutions of cadmium chloride and sodium sulfide are mixed, a precipitate of cadmium sulfide forms, leaving soluble sodium chloride in the solution. The corresponding equations are:

Molecular equation: CdCl₂(aq) + Na₂S(aq) ⇒ CdS(s) + 2 NaCl(aq)

Ionic equation: Cd²⁺(aq) + 2 Cl⁻(aq) + 2 Na⁺(aq) + S²⁻(aq) ⇒ CdS(s) + 2 Na⁺(aq) + 2 Cl⁻(aq)

Net ionic equation: Cd²⁺(aq) + S²⁻(aq) ⇒ CdS(s)

Let's consider the molecular equation for the reaction between aqueous cadmium chloride and aqueous sodium sulfide to form a precipitate of cadmium sulfide and aqueous sodium chloride. This is a double displacement reaction.

CdCl₂(aq) + Na₂S(aq) ⇒ CdS(s) + 2 NaCl(aq)

The ionic equation includes all the ions and insoluble species.

Cd²⁺(aq) + 2 Cl⁻(aq) + 2 Na⁺(aq) + S²⁻(aq) ⇒ CdS(s) + 2 Na⁺(aq) + 2 Cl⁻(aq)

The net ionic equation includes only the ions that participate in the reaction (not spectator ions) and the insoluble species.

Cd²⁺(aq) + S²⁻(aq) ⇒ CdS(s)

When aqueous solutions of cadmium chloride and sodium sulfide are mixed, a precipitate of cadmium sulfide forms, leaving soluble sodium chloride in the solution. The corresponding equations are:

Molecular equation: CdCl₂(aq) + Na₂S(aq) ⇒ CdS(s) + 2 NaCl(aq)

Ionic equation: Cd²⁺(aq) + 2 Cl⁻(aq) + 2 Na⁺(aq) + S²⁻(aq) ⇒ CdS(s) + 2 Na⁺(aq) + 2 Cl⁻(aq)

Net ionic equation: Cd²⁺(aq) + S²⁻(aq) ⇒ CdS(s)

You can learn more about double displacement reactions here:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.