Evidence of Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which substances (reactants) undergo a transformation to form new substances (products) with different properties.

Front

What are indicators of a chemical reaction?

Back

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

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product?

Back

A substance that is formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

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

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What does it mean when a substance changes color during a reaction?

Back

It indicates that a chemical change has occurred, often due to the formation of new substances.

Front

What is an example of a gas being produced in a chemical reaction?

Back

The production of carbon dioxide gas when vinegar reacts with baking soda.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases heat, causing the temperature of the surroundings to increase.

Front

What is an endothermic reaction?

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A chemical reaction that absorbs heat, causing the temperature of the surroundings to decrease.