2007-02-01 02:21:02 · 3 answers · asked by Matthew M 1 in Science & Mathematics ➔ Chemistry
not sure about the fluoride version but magnesium chloride is a common de-icer for roads. see link below for details.
http://en.wikipedia.org/wiki/Magnesium_chloride
and it's flUOride not flOUride
2007-02-01 02:28:19 · answer #1 · answered by Dr W 7 · 2⤊ 0⤋
MgF2 (or MgCl2 if the above answerer is right) dissociates into 3 ions (Mg2+ and 2Cl/F-), and thus raises the molality of the ice/water (the number of particles dissolved per kilogram). When the molality increases, the freezing point decreases, so the ice melts.
I don't imagine this would be any more effective than regular old NaCl, since the ions/unit weight are about the same. Maybe Mg is more environmentally friendly.
2007-02-01 10:40:49 · answer #2 · answered by mrsocialist 2 · 0⤊ 2⤋
because you can transport the MgCl2 in a tank as a solution an spray it on roads.
Much better than dropping unevenly solid NaCl.
MgF2 will eat the sand (silica) in the asphalt, better not use it for de-iceing. lol
2007-02-01 10:59:07 · answer #3 · answered by scientific_boy3434 5 · 0⤊ 1⤋