During the cold days of winter, to decrease the the freezing point of water and avoid ice and snow on the roads.
Rock salt (or calcium chloride, potassium chloride) is applied to roads with ice or snow; the freezing point of water is lowered.
Before would be a very bad choice as the rain would likely dissolve the rock salt and wash most of the rock salt away before the rain actually began to freeze significantly.
to melt ice on the roads
Salt lowers the freezing temperature of water, which means that it has to be colder for the water to freeze.
mix 2tbsp of olive oil with 2tbsp of rock salt. Apply daily and moisturise!
The address of the Salt Rock is: 5575 Madison Creek Rd, Salt Rock, 25559 9801
Rock salt is not a rock...its just a salt that can be extracted from salty water especially from sea water.
Rock salt and table salt are both sodium chloride - NaCl; table salt is the pure form of rock salt.
Rock salt is chemical!
mixture of rock particle and salt
Rock salt
You can eat rock salt