Final answer:
When solid sodium sulfide is put into water, it dissociates into sodium cations (Na+) and sulfide anions (S2-). The reaction is Na2S(s) + H2O(l) → 2Na+(aq) + S2-(aq). Sodium sulfide is a strong electrolyte as it completely dissociates into ions in water.
Step-by-step explanation:
When solid sodium sulfide is put into water, it dissolves and dissociates into its constituent ions, sodium cations (Na+) and sulfide anions (S2-). The dissociation reaction is as follows:
Na2S(s) + H2O(l) → 2Na+(aq) + S2-(aq)
In this reaction, the solid compound sodium sulfide breaks down into its ionic form when it comes into contact with water. Sodium sulfide is a strong electrolyte because it completely dissociates into ions, allowing for the conduction of electric current in the resulting aqueous solution.