Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

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 does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes state but not composition.

Front

What is an example of a chemical change?

Back

Rust forming on iron is a chemical change because it creates a new substance.

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed in the process.

Front

What is an indicator of a chemical reaction?

Back

Color change, gas production, temperature change, and odor change are indicators of a chemical reaction.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.