The negative areas of the water molecules surround the positive sodium ions. As the attractions from the water molecules and their motion pulls the ions apart, the sodium chloride crystal dissolves.

Students will be able to develop and explain a particle-level model to describe their observations of water dissolving salt, the water evaporating, and the salt crystals re-forming. Dissolving a solid ...

Why do ocean waters stay open year-round in all but the furthest arctic climates, while freshwater lakes freeze over in the ...

Its most common compounds include dissolved sodium chloride (or table salt), its solid form ... Sodium carbonate was used in soap, and also, in the process of mummification thanks to its water ...