Question

Tim adds salt as he starts to heat a pot of water to cook pasta. When the water is boiling, he notices the salt has dissolved explain y

Answer 1

You add salt to increase the boiling point so when its at that point by then all the salt has dissolved because it was warm water

Answer 2

In this scenario, adding salt to water is equivalent to adding solute (salt) to a solvent (water).

Most solvents have a maximum solute that they can incorporate, and this maximum depends on the temperature, as the temperature increases, also does the maximum (this may be because as the temperature increases, also the space between particles) so if the salt is not fully dissolved when the water is cold, as the water heats up more and more salt will be dissolved, and at the moment where water starts boiling, all or most of the salt will be incorporated in the solution