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 a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as cutting or folding paper.

Front

What indicates a chemical reaction has occurred?

Back

The formation of a gas, change in color, temperature change, or the formation of a precipitate are indicators of a chemical reaction.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; the mass of the reactants equals the mass of the products.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, ensure that there are equal numbers of each type of atom on both sides of the equation.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction, found on the left side of a chemical equation.

Front

What is a product?

Back

A product is a substance that is formed as a result of a chemical reaction, found on the right side of a chemical equation.

Front

What is an example of a chemical reaction?

Back

An example of a chemical reaction is the rusting of iron, where iron reacts with oxygen to form iron oxide.

Front

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

Back

The total mass of the reactants before the reaction is equal to the total mass of the products after the reaction.

Front

What is an indicator of a physical change?

Back

An indicator of a physical change is a change in state, such as melting ice into water.