U05 Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

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 is a coefficient in a chemical equation?

Back

A number placed before a formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product?

Back

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

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 decomposition reaction?

Back

A type of chemical reaction where one compound breaks down into two or more simpler products.

Front

What is a combustion reaction?

Back

A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat.

Front

What is a single replacement reaction?

Back

A reaction where one element replaces another element in a compound.

Front

What is a double replacement reaction?

Back

A reaction where the anions and cations of two different compounds exchange places, forming two new compounds.