Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

Front

What are some signs that a chemical reaction has occurred?

Back

Color change, odor change, gas production, formation of a precipitate, and temperature change.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed in the process.

Front

Can you give an example of a chemical change?

Back

Burning wood, rusting iron, and cooking food are all examples of chemical changes.

Front

Can you give an example of a physical change?

Back

Freezing water, melting ice, and dissolving sugar in water are examples of physical changes.

Front

What happens to the atoms in a chemical reaction?

Back

Atoms are rearranged to form new substances, but they are not created or destroyed.

Front

What is the difference between reactants and products?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What is an example of a reaction that produces gas?

Back

Baking soda reacting with vinegar produces carbon dioxide gas.