Salt lowers the freezing temperature of water, which means that it has to be colder for the water to freeze.
Salt
It will certainly not keep the water in the bucket from freezing and, if the temperature goes low enough, the bottled salt water will also freeze.
During the cold days of winter, to decrease the the freezing point of water and avoid ice and snow on the roads.
Adding salt to water lowers the freezing point. Thus, the roadways stay ice free.
The freezing point of water is lowered because by dissolution salt release heat.
Adding salt to water the freezing point decrease.
Salt decreases the freezing point of water and increases the boiling point of water.
Freezing
Since the salt makes water boil, get colder, and melt faster, salt water would be warmer in the summer and colder in the winter, but the salt would help, but not 100%, keep the water from freezing.
Salt mixes with the water raising it's freezing temperature above normal.
Salt, being a crystalized mineral with no water content has no freezing point.
It does not, but salt affects the freezing point. All solids are frozen. Each has a different freezing point. Ice is just the freezing point of water. But your computer keys are frozen too. Different substances freeze differently. But for your purposes, compare water to salt water. The salt in the water causes there to be more things in the water that disrupt the tight hydrogen bonds.Since freezing is tighter H-bonds, salt lowers the freezing temperature because it is harder to freeze it now since there is salt in it.