Question

For each statement, answer with YES if evidence of a chemical reaction is present. Answer NO if there is no evidence of a chemical reaction.

Molten candle wax solidifies?
1) YES
2) NO

Answer 1

The solidification of molten candle wax is a physical change, not a chemical reaction, because it does not involve the creation of a new substance. Conversely, mixing sodium chloride with silver nitrate to form silver chloride is a chemical change, as it results in a new product with different properties.

Step-by-step explanation:

When a molten candle wax solidifies, this is an example of a physical change, not a chemical reaction. The change is physical because the wax is transitioning from one state of matter (liquid) to another (solid) without altering its chemical structure. No new substances are formed, and the chemical composition of the wax remains the same before and after solidification.

On the other hand, mixing sodium chloride (NaCl) with silver nitrate (AgNO3) to form silver chloride (AgCl) is an example of a chemical change. During this process, the ions in the reactants are rearranged to form a new product, indicating that a chemical reaction has occurred. This is evidenced by the formation of a white precipitate of silver chloride which is a different substance with distinct properties.