Chemical Reactions and Conservation of Mass

Fill-in-the-blank flashcards reviewing clues for chemical reactions, law of conservation of mass, and physical phase changes.

Four clues that a chemical reaction is taking place include transfer of energy, change of color, production of gas, and formation of a __________.

precipitate

Heat and light in a chemical reaction are examples of a transfer of __________.

energy

When production of gas occurs, you see bubbles or sometimes actual __________ come out.

steam

A precipitate is the __________ that forms and settles out when two liquids are mixed.

solid

The mass of the products must equal the mass of the __________.

reactants

The law of conservation of mass states that we cannot create or __________ mass.

destroy

A phase change, such as going from a solid to a liquid or liquid to gas, is a __________ change.

physical