Molten sodium chloride:
- Physical state: Molten sodium chloride is in a liquid state at temperatures above its melting point, which is around 801°C (1,474°F).
- Properties: In its molten state, sodium chloride dissociates into its constituent ions: sodium (Na+) and chloride (Cl-) ions. These ions are free to move and conduct electricity, making molten sodium chloride an excellent conductor of electricity. It has a low viscosity and high density, and solidifies upon cooling.
Brine:
- Physical state: Brine is a solution of sodium chloride in water. It can exist in liquid or solid state depending on temperature and concentration.
- Properties: In brine, sodium chloride molecules are dissolved in water. The concentration of sodium chloride in brine can vary, but it is generally less than the concentration found in molten sodium chloride. Brine conducts electricity due to the presence of dissolved ions, but not to the same extent as molten sodium chloride. Also, the freezing point of water decreases as the concentration of sodium chloride increases.
In summary, the main difference between molten sodium chloride and brine is their physical state. Molten sodium chloride is a liquid above its melting point, while brine is a solution of sodium chloride in water.
