Unit 7.1 Review

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products), often involving changes in energy and properties.

Front

Give an example of a chemical reaction.

Back

Rust forming on a metal fence is an example of a chemical reaction.

Front

What is solubility?

Back

Solubility is the ability of a substance (solute) to dissolve in another substance (solvent) without changing its chemical identity.

Front

Why is solubility considered a physical property?

Back

Because it does not involve a chemical reaction and does not change the chemical composition of the solute.

Front

What happens to particles of a substance as it melts?

Back

The particles move farther apart as the substance transitions from solid to liquid.

Front

What is the product of the reaction between sulfuric acid (H₂SO₄) and calcium carbonate (CaCO₃)?

Back

The products include calcium sulfate (CaSO₄), water (H₂O), and carbon dioxide (CO₂).

Front

Which of the following is NOT a product of the reaction between sulfuric acid and calcium carbonate?

Back

Calcium nitrate (CaN₂O₆) is NOT a product of this reaction.

Front

What evidence indicates a chemical reaction is occurring?

Back

A change in color and the release of gas bubbles are indicators of a chemical reaction.

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 the formation of new substances.

Front

What is an example of a physical change?

Back

Ice melting into water is an example of a physical change.