Does table salt or rock freeze ice cream?

Neither table salt nor rock salt can freeze ice cream, as salt actually lowers the freezing point of liquids.

Ice cream is a frozen dessert made from milk, sugar, and flavorings, and it typically contains a small amount of salt to enhance the flavor. When salt is added to water, it dissociates into sodium and chloride ions, which interfere with the formation of ice crystals, thereby lowering the freezing point of the liquid. This principle is utilized in making ice cream, where the salt content prevents complete solidification, resulting in the creamy texture of the dessert.

However, it's worth noting that adding too much salt to ice cream can make it unpleasantly salty and may negatively affect its texture. Therefore, salt is carefully used in small quantities to achieve the desired flavor balance in ice cream.