When an acid and a base react in stoichiometric amounts, the resulting solution is neutral, meaning it has a pH of 7. This is because the hydrogen ions (H+) from the acid and the hydroxide ions (OH-) from the base combine to form water (H2O), which is a neutral substance.

However, it is not accurate to say that neutralization completely cancels the properties of an acid and a base. While the resulting solution may be neutral, the original properties of the acid and base can still be observed if additional acid or base is added.

For example, if a strong acid is added to a neutralized solution, the pH will decrease and the solution will become acidic again. Similarly, if a strong base is added to a neutralized solution, the pH will increase and the solution will become basic again.

Therefore, while neutralization can produce a neutral solution, it does not completely eliminate the properties of the original acid and base.