* Ionic Compounds: Sodium chloride is an ionic compound, meaning it's formed by the electrostatic attraction between positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-).
* Solid State: In its solid state, the ions are locked in a rigid crystal lattice structure. The ions can vibrate, but they can't move freely, so they can't conduct electricity.
* Molten State: When sodium chloride melts, the strong electrostatic forces holding the ions together weaken. The ions break free from the lattice and become mobile. These mobile ions can now carry an electrical charge when a potential difference is applied.
* Electrolysis: When an electric current is passed through molten sodium chloride, the positive sodium ions migrate towards the negative electrode (cathode), and the negative chloride ions migrate towards the positive electrode (anode). This movement of ions constitutes the flow of electrical current.
In summary: Molten sodium chloride conducts electricity because its constituent ions become free to move and carry electrical charges. This mobility is a direct consequence of the disruption of the crystal lattice structure upon melting.
