at what temp does road salt not work at?

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at what temp does road salt not work at?

2007-03-06 13:47:34 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

De-icing chemicals work by lowering the freezing point of water. A 23.3% concentration of salt water freezes at -6o F and a 29.8% solution of calcium chloride freezes at -67o F. These low freezing points are what makes salt and calcium chloride useful.

2007-03-06 13:59:29 · answer #1 · answered by Crash 7 · 0⤊ 0⤋

Usually around 15 degrees F is where it stops working.

2007-03-06 22:01:45 · answer #2 · answered by xox_bass_player_xox 6 · 0⤊ 0⤋