Chemical Reaction Review

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products).

Front

What evidence indicates a chemical change has occurred?

Back

Evidence includes gas formation (bubbles), color change, temperature change, and precipitate formation.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its composition, while a chemical change results in the formation of new substances.

Front

What happens when vinegar and baking soda are mixed?

Back

A chemical reaction occurs, producing carbon dioxide gas, which creates bubbles.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical composition.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change because it transforms the wood into ash and gases.

Front

What does it mean if a substance changes color during a reaction?

Back

It often indicates a chemical change has occurred, as new substances with different properties are formed.

Front

What is the role of temperature in chemical reactions?

Back

Temperature can affect the rate of a chemical reaction; higher temperatures usually increase reaction rates.

Front

What is an indicator of gas formation in a reaction?

Back

Bubbles or fizzing during a reaction indicate that a gas is being produced.