Question

write the balanced net ionic equation for the reaction when alcl₃ and na₂s are mixed in aqueous solution. if no reaction occurs, simply write only nr. be sure to include the proper phases for all species within the reaction.

Explanation:

Step1: Write the dissociation equations

$$\mathrm{AlCl_3(aq) ightarrow Al^{3 +}(aq)+3Cl^-(aq)}$$

$$\mathrm{Na_2S(aq) ightarrow 2Na^+(aq)+S^{2 -}(aq)}$$

Step2: Predict the product and check solubility

The reaction between $\mathrm{Al^{3+}}$ and $\mathrm{S^{2 -}}$:

$$2\mathrm{Al^{3 +}(aq)}+3\mathrm{S^{2 -}(aq)} ightarrow\mathrm{Al_2S_3(s)}$$

Sodium chloride ($\mathrm{NaCl}$) is soluble and remains as ions ($\mathrm{Na^+}$ and $\mathrm{Cl^ -}$) in solution and are spectator ions.

Answer:

$$2\mathrm{Al^{3 +}(aq)}+3\mathrm{S^{2 -}(aq)} ightarrow\mathrm{Al_2S_3(s)}$$