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Scientific Reaction

As mentioned, the reaction that is created between salt and ice is an eutectic frigorific mixture. For the salt and ice challenge, molecular polarizability is a key factor of this reaction. The ions in Sodium chloride (table salt) are heavily influenced by the molecular polarizability of the ice itself. The difference between the spacing of the electrons in the table salt  and ice cause this reaction. The melting point of ice is decreased due to the incorporation of table salt and this then causes a binding of the two substances. The ice is neutralized by the salt, thus causing the ice to melt easier and at a higher rate.

Involved Health Hazards and Injuries

The stunt leaves behind an ice burn that increases in severity the longer the chemical reaction is occurring on the skin. In the ice burn that occurs from this reaction, the ice crystals that form have the potential to burn and scar the skin permanently the longer the reaction occurs. Blistering at the site of injury is often common in more severe cases. The freezing of tissue between the dermal and epidermal levels of the skin lead to a disruption in circulation initially causing frost nip. After a few days from a salt and ice challenge, depending on the severity and duration of the burn, regeneration of epithelial cells should slowly occur along with scarring and surface disruption.