Salt dissolves in water. Is this a chemical or physical change?
This question is bound to provoke controversy; it certainly has before. The dissolution of sodium chloride in water is clearly a chemical change.
Please, before you say that such dissolution is reversible, read the entirety of this old thread. As always, chemical change is characterized by the formation of new substances and the making and breaking of strong chemical bonds.
The strong ionic interaction between
And this one is unambiguously an example of chemical change. Below undergraduate level, many teachers would maintain that salt dissolution is physical. They are mistaken.