At high temperature the crystalline structure is affected, it is less stable and the solubility is greater.
Cold water can dissolve less salt than can hot water. Therefore, you would reach the saturation point faster with cold water.
Water with 1 gram of salt completely dissolved in it will freeze faster than an equal volume of water with 2g completely dissolved in it.
Salt and sugar do not evaporate, but the water that they are dissolved in does.
salt dissolve faster in hot water
normal water with salt
the salt prevents the water from getting cold
Sugar sinks at the same rate in warm or cold water. Sugar dissolves faster in warm water.
I would think it would dissolve faster in fresh water, as the fresh water doesn't have anything dissolved in it yet whereas the salt water has dissolved salts and so less room for the sugar molecules. A. yes; sugar does dissolve faster than salt does, in fresh water.
salt
salt in hot water
salt in hot water
Fresh water freezes faster than salt water because salt lowers the freezing point of water. When salt is dissolved in water, it disrupts the formation of ice crystals, requiring the salt water to become colder than fresh water in order to freeze. This phenomenon is known as the "freezing point depression."