Types & Rates of Chemical Reactions

Front

What happens to atoms in a chemical reaction?

Back

Atoms are never lost or gained, just rearranged.

Front

What is a chemical reaction in which energy is absorbed?

Back

An endothermic reaction.

Front

What type of chemical reaction occurs when two or more substances combine to form one new compound?

Back

Synthesis.

Front

What type of chemical reaction is represented by the equation Zn + 2HCl → ZnCl2 + H2?

Back

Single replacement.

Front

What is the role of enzymes in chemical reactions?

Back

Enzymes increase the rate of chemical reactions.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy, usually in the form of heat.

Front

What is a decomposition reaction?

Back

A reaction where one compound breaks down into two or more simpler substances.

Front

What is a double replacement reaction?

Back

A reaction where two compounds exchange ions to form two new compounds.

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.