Calcium carbonate (CaCO3) is indeed insoluble in water. This characteristic impacts its ability to conduct electricity. Ionic compounds, such as calcium carbonate, typically dissociate into their respective ions when dissolved in water. However, since CaCO3 does not dissolve, it does not release calcium ions (Ca2+) and carbonate ions (CO32-) into the solution.
For a substance to conduct electricity, it must have charged particles that can move freely. In the case of soluble ionic compounds, when they dissolve in water, the ions are free to move, allowing them to conduct electricity. Since CaCO3 remains largely intact as a solid and does not dissociate into ions in water, it does not conduct electricity.
In conclusion, although calcium carbonate is made of ions, its insolubility in water means that it does not produce free-moving ions in solution, and therefore, it cannot conduct electricity.