Question

2 you find a nail on the ground in the parking lot, in a small puddle of water. rust has formed on the outside of the nail. was this a physical or chemical change? explain your answer. rust

Explanation:

Rusting is a chemical change. A chemical change involves the formation of new substances. When iron (in the nail) reacts with oxygen and water (from the puddle), rust (iron oxide) is formed. This is a chemical reaction as the composition of the nail (iron) changes to form a new compound (rust). Physical changes, on the other hand, do not create new substances; they only change the state or appearance of a substance (e.g., melting ice, cutting paper). Since rust is a new substance, this is a chemical change.

Answer:

This was a chemical change. Rust (iron oxide) is a new substance formed when iron (in the nail) reacts with oxygen and water. Chemical changes produce new substances, while physical changes do not.