Question

Henry mixed salt and water together in a cup until he observed a clear solution. he measured the mass of the solution. then he placed the cup outside for several sunny days during the summer. after a week, he observed that only solid salt remained in the cup and the mass had decreased. henry concluded that a physical and chemical change occurred in this investigation. which statements correctly defend or dispute his conclusion?

Answer 1

Hello Ankith
The mass of the content of the cup decreased because water in the cup evaporated,which is a physical change.No chemical change took place because it is unlikely for two neutral substances i.e. salt and water to react and cause a chemical change.
Hope it Helps

Answer 2

Answer:

He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.

Explanation: Got It Right on Edge