Evidence of Chemical Reactions

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes changes such as color change, temperature change, gas production, or the formation of a precipitate.

Front

What happens to the mass of reactants in a chemical reaction?

Back

According to the law of conservation of mass, the mass of the reactants must equal the mass of the products.

Front

What is rust, and how is it formed?

Back

Rust is a chemical compound formed when iron reacts with oxygen and moisture in the air, indicating a chemical reaction.

Front

What is a precipitate?

Back

A precipitate is a solid that forms when two liquids are mixed and a chemical reaction occurs.

Front

What does it mean when a solution's temperature increases during a reaction?

Back

An increase in temperature during a reaction indicates that a chemical reaction is occurring, often releasing energy.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

How can you tell if a chemical reaction has occurred?

Back

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

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.