* Dissolution: The NaCl crystals break apart into individual sodium (Na+) and chloride (Cl-) ions. These ions become surrounded by water molecules, forming a hydrated solution.
* Endothermic process: Dissolving NaCl in water is an endothermic process, meaning it absorbs heat from the surroundings. This is why adding salt to ice can help melt the ice.
The overall reaction can be represented as:
NaCl(s) + H₂O(l) → Na⁺(aq) + Cl⁻(aq)
Key points to remember:
* Solubility: NaCl is highly soluble in water, meaning it readily dissolves.
* Temperature: The solubility of NaCl increases with temperature. However, even in ice-cold water, a significant amount of salt will still dissolve.
* Melting of ice: The endothermic nature of dissolving salt causes the surrounding water molecules to absorb heat, which can help melt the ice. This is the principle behind using salt on icy roads.
Let me know if you have any further questions!
