Question

Classify the following as a physical or chemical change. State a reason for the choice.

Dissolving salt in water.

Answer 1

Physical change:

• A physical change is a change in which no new substance is formed.
• A physical change is temporary and reversible.
• In a physical change, the chemical composition of the original substance is not altered.
• For example, drying wet clothes, breaking of a glass tumbler, drying paints, etc.
• Dissolving salt in water is a physical change because the salt can be recovered back by evaporating the water.