This is the correct answer. It's why magnesium chloride is applied to roads in the winter, to prevent water from freezing by utilizing the same principal. Interesting to note that since mag chloride has an additional chloride atom, it can lower the freezing point by more degrees than rock salt.
SnowboardSyd t1_j6wg2zs wrote
Reply to comment by No_Masterpiece6568 in What are the effects of adding rock salt to a cooler full of ice? by Ok_Kareem_7223
This is the correct answer. It's why magnesium chloride is applied to roads in the winter, to prevent water from freezing by utilizing the same principal. Interesting to note that since mag chloride has an additional chloride atom, it can lower the freezing point by more degrees than rock salt.