Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties. Examples include rusting, burning, and souring milk.

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 breaking.

Front

Which of the following is NOT an example of a chemical change?

Back

Breaking a pencil.

Front

What happens to the atoms during a chemical change?

Back

During a chemical change, atoms are rearranged to form new substances, but the total number of atoms remains the same.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and separates from a liquid mixture as a result of a chemical reaction.

Front

What is the chemical formula for sodium phosphate?

Back

Na₃PO₄.

Front

How many cations are produced when 4 formula units of titanium (IV) oxide dissolve in water?

Back

8 cations.

Front

What is the difference between a reactant and a product?

Back

A reactant is a substance that undergoes a chemical change, while a product is a substance formed as a result of that change.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.