7.1 - 3 Characteristics of Chemical Reactions

Front

What is a chemical reaction?

Back

The process by which one or more substances change to produce one or more different substances.

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What is a product in a chemical reaction?

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A substance produced during a chemical reaction.

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What is a reactant?

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A substance that undergoes change during a chemical reaction.

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What indicates that a chemical reaction has occurred?

Back

Signs include gas formation, color change, temperature change, and the formation of a precipitate.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.

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What is a chemical process?

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A method or means of changing one or more chemicals or chemical compounds.

Front

What happens to atoms during a chemical reaction?

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Atoms regroup to form new molecules.

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

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

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What is an example of a chemical reaction?

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The reaction of sodium and chlorine to form sodium chloride (salt).

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What is meant by conservation of mass in a chemical reaction?

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The total mass of reactants equals the total mass of products in a chemical reaction.