Analyze Chemical Equations and Reactions

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. Example: Water boiling to form steam.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Example: Iron rusting in air.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that is present before the reaction starts and is consumed during the 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

What do coefficients in a chemical equation represent?

Back

Coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made.

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

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, ensuring mass is conserved.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another without changing its chemical composition. Example: Ice melting to water.

Front

What is an example of a chemical reaction?

Back

An example of a chemical reaction is burning wood in a fireplace, which produces ash, smoke, and gases.