* Ionic Compounds: Sodium salt (NaCl) is an ionic compound. This means it's made up of positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-).
* Solid State: In the solid state, these ions are arranged in a fixed, rigid lattice structure. While there are charges present, they are not free to move, so the solid cannot conduct electricity.
* Dissolving in Water: When sodium salt dissolves in water, the water molecules surround the ions, breaking the ionic bonds and allowing the ions to move freely.
* Conductivity: These free-moving ions are what make the solution conduct electricity. The ions can now carry electrical charge through the solution.
In short, a soluble solid sample of sodium salt doesn't conduct electricity because the ions are locked in a rigid structure. However, when dissolved in water, the ions become mobile and can carry charge, allowing the solution to conduct electricity.
