Answer:
Step-by-step explanation:
The mixing of water and salt indicates a physical change since the chemical makeup of the components involved remains unchanged. Water and salt remain unchanged, and no new compounds are produced. The characteristics of water and sodium are not affected, and the two substances may be physically separated again.
The melting of ice to water, on the other hand, signifies a chemical change since the chemical makeup of the material changes. When ice melts, it goes from a solid state of water molecules to a liquid state of water molecules. The substance's qualities are altered and cannot be restored by basic physical means.
In short, a chemical change is one that results in the formation of a new substance, whereas a physical change does not result in the formation of new material. In this scenario, melting ice into water is a chemical change because it results in the formation of a new material (water), but combining water with sodium is a physical change since it does not result in the formation of a new substance.