Chemical Reactions

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 reaction has occurred?

Back

The production of a new substance is the best evidence of a chemical reaction.

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What does the Law of Conservation of Mass state?

Back

Mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What do coefficients in a chemical equation represent?

Back

Coefficients indicate the number of molecules of each reactant and product involved in the reaction.

Front

What is a balanced chemical equation?

Back

A chemical equation where the number of atoms for each element is the same on both sides of the equation.

Front

What is combustion?

Back

A chemical reaction that occurs when a substance reacts with oxygen, producing heat and light, often resulting in the formation of carbon dioxide and water.

Front

What is a phase change in a chemical reaction?

Back

A transition of a substance from one state of matter (solid, liquid, gas) to another, which can occur during a chemical reaction.

Front

What is an example of a chemical reaction that forms a new substance?

Back

Burning wood, where wood (reactant) transforms into ash, smoke, and gases (products).