Exemplar 4 Review

Front

What effect does adding vinegar at 10 °C have on the baking soda reaction?

Back

It would decrease the rate of reaction.

Front

What is a chemical change?

Back

A change that results in the formation of new substances, often indicated by a color change or release of odor.

Front

What does the Law of Conservation of Mass state?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What type of change occurs when baking a cake?

Back

A chemical change.

Front

What indicates that a chemical reaction has NOT occurred?

Back

No observable change in the properties of the substances involved.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

What happens to the mass of reactants and products in a chemical reaction?

Back

The total mass remains the same.

Front

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

Back

A physical change does not alter the substance's composition, while a chemical change does.

Front

What is an indicator of a chemical reaction?

Back

Color change, gas production, or temperature change.