Chemical and Physical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the rearrangement of atoms. Examples include rusting, burning, and reacting acids with bases.

Front

Is dissolving sodium hydroxide in water a chemical or physical change?

Back

Physical Change

Front

What happens to a glass bottle when it shatters?

Back

It undergoes a physical change.

Front

What is produced when hydrochloric acid reacts with potassium hydroxide?

Back

A salt, water, and heat are produced, indicating a chemical change.

Front

What type of change is copper tarnishing?

Back

Chemical Change

Front

What is an example of a physical change?

Back

Examples include melting ice, boiling water, or dissolving sugar in water.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.

Front

Can a chemical change be reversed?

Back

Chemical changes are often not reversible by simple physical means, as they involve the formation of new substances.