Chemical Reactions

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties, such as burning paper.

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

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

Back

The total mass of the reactants equals the total mass of the products.

Front

What is a reactant?

Back

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

Front

What is a product?

Back

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

Front

What is a precipitate?

Back

A precipitate is a solid that forms when two liquids react with each other.

Front

What is an example of a physical change?

Back

Cutting a piece of paper is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning a piece of paper is an example of a chemical change.

Front

If reactant A has 5g and product C has 9g, how many grams does reactant B have?

Back

4g.

Front

If a student dissolves 25 grams of salt in 1,000 grams of water, what is the mass of the saltwater mixture?

Back

1,025 grams.