A solution of salt water is boiled. The water evaporates and solid salt remains. Which statement is true?

Question

A.
The salt has undergone a physical change, and the water has undergone a chemical change.

B.
The salt and the water have both undergone chemical changes.

C.
The salt has undergone a chemical change, and the water has undergone a physical change.

D.
The salt and the water have both undergone physical changes.

Answer 1

The correct statement is:

A. The salt has undergone a physical change, and the water has undergone a chemical change.

However, this statement actually does not entirely represent the changes occurring during the process described.

In this situation, the correct interpretation is that both the salt and water undergo physical changes. The water evaporating is a physical change (turning from liquid to vapor), and the salt remaining is also a result of a physical change (the solute crystallizing from the solution).

Regarding the options provided, the most accurate answer would be a rewording to express that both the salt and water have undergone physical changes. But since that isn't explicitly mentioned, you might choose A if it represents the point of confusion.

Thus, to clarify: The water has undergone a physical change, and the salt has not undergone a chemical change, as it merely remains in solid form. All transformations involved do not involve the creation of new substances.