Here's why:
* Ionic Bonding: Salt (NaCl) is an ionic compound. It's formed by the electrostatic attraction between positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). These ions are tightly packed in a crystal lattice structure.
* Fixed Ions: In the solid state, the ions are fixed in their positions, unable to move freely. This means there are no mobile charge carriers to facilitate the flow of electric current.
How salt becomes a good conductor:
Salt becomes a good conductor when it dissolves in water. Here's what happens:
1. Dissolving: When salt dissolves in water, the water molecules break apart the ionic bonds holding the sodium and chloride ions together.
2. Free Ions: The ions become free to move around in the solution.
3. Charge Carriers: These freely moving ions now act as charge carriers, allowing an electric current to flow through the solution.
In summary: It's not the salt itself that conducts electricity, but the free ions in a saltwater solution that make it a good conductor.
