Chemical Reactions 1

Front

What is a chemical reaction?

Back

A process that involves the transformation of one or more substances into new substances with different properties.

Front

What does the Law of Conservation of Mass state?

Back

In a chemical reaction, mass is neither created nor destroyed; it remains constant.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides of the reaction.

Front

What is an example of a chemical change?

Back

Rusting of iron, where iron reacts with oxygen to form iron oxide.

Front

What is an example of a physical change?

Back

Melting of ice, where water changes from solid to liquid without altering its chemical composition.

Front

What happens during a combustion reaction?

Back

A substance reacts with oxygen, releasing energy in the form of heat and light.

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that undergo a chemical change, while products are the new substances formed.

Front

What is an indicator of a chemical change?

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Signs include color change, temperature change, gas production, or formation of a precipitate.

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 role of catalysts in chemical reactions?

Back

Catalysts speed up chemical reactions without being consumed in the process.