Because the mixture NaCl + CaCl2 has a lower melting point that NaCl.
Sodium Chloride...NaCl
Table salt does not naturally contain calcium. It is mainly composed of sodium chloride. However, some manufacturers may add anti-caking agents to table salt, which can contain trace amounts of calcium.
water molecule will splits sodium chloride to sodium ions and chloride ions via hydrogen bonding.
The product of calcium chloride and water is a solution of calcium chloride in water. When calcium chloride is added to water, it dissociates into calcium ions (Ca2+) and chloride ions (Cl-), which become dispersed in the water molecules.
When calcium chloride is added to water, it lowers the freezing point. When spread on ice, it has the effect of melting the ice, and turning it to water. Calcium chloride is slightly less corrosive to metals that its "cousin", sodium chloride (salt), and so causes less rusting of cars, bridges, and guard rails.
Any reaction occur.
Salt (table salt, rock salt, halite) is sodium chloride, NaCl. Salt added on the roads during the winter is generally also sodium chloride but calcium chloride may be used.
Ice melt faster when: - the temperature is higher - powdered salts as sodium chloride or calcium chloride are added
When calcium chloride is added to sodium chloride, it forms a eutectic mixture with a lower melting point than either compound alone. This is due to the disruption of the crystal lattice structure, creating more gaps between the molecules, which reduces the overall energy needed to break these bonds and lower the melting point of the mixture.
Sodium chloride is easily dissolved.
Salts (sodium chloride, calcium chloride) are added to reduce the melting point of ice; also the heat of dissolution contribute to the melting.
Sodium chloride is added to increase the viscosity of the solution.
Sodium Chloride...NaCl
Table salt does not naturally contain calcium. It is mainly composed of sodium chloride. However, some manufacturers may add anti-caking agents to table salt, which can contain trace amounts of calcium.
water molecule will splits sodium chloride to sodium ions and chloride ions via hydrogen bonding.
0 % of sodium chloride is equal with no NaCl !
The product of calcium chloride and water is a solution of calcium chloride in water. When calcium chloride is added to water, it dissociates into calcium ions (Ca2+) and chloride ions (Cl-), which become dispersed in the water molecules.