Chapter 13 Vocabulary

Question 1

Chemical Reaction

Answer 1

The process by which one or more substances change to produce one or more different substances.

Question 2

Precipitate

Answer 2

A solid that is produced as a result of a chemical reaction in a solution.

Question 3

Gas Formation

Answer 3

A gas that is formed when a chemical change takes place.

Question 4

Solid Formation

Answer 4

A solid that is formed when a chemical change takes place.

Question 5

Color Change

Answer 5

The change of color of a substance that shows that a chemical change is taking place.

Question 6

Energy Change

Answer 6

Energy being given off or taken in that shows that a chemical change is taking place.

Question 7

Chemical Formula

Answer 7

A combination of chemical symbols and numbers to represent a substance.

Question 8

Subscript

Answer 8

A number below and to the right of an element to represent how many atoms of that element are in the compound.

Question 9

Chemical Equation

Answer 9

A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.

Question 10

Reactant

Answer 10

A substance or molecule that participates in a chemical reaction.

Question 11

Product

Answer 11

The substance that forms in a chemical reaction.

Question 12

Law of Conservation of Mass

Answer 12

The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.

Question 13

Synthesis Reaction

Answer 13

A reaction in which two or more substances combine to form a new compound.

Question 14

Decomposition Reaction

Answer 14

A reaction in which a single compound breaks down to form two or more simpler substances.

Question 15

Single-Displacement Reaction

Answer 15

A reaction in which one element or radical takes the place of another element or radical in a compound.

Question 16

Double-Displacement Reaction

Answer 16

A reaction in which a gas, a solid precipitate, or a molecular compound forms from the exchange or ions between two compounds.

Question 17

Exothermic Reaction

Answer 17

A chemical reaction in which heat is released to the surroundings.

Question 18

Endothermic Reaction

Answer 18

A chemical reaction that requires heat.

Question 19

Law of Conservation of Energy

Answer 19

The law that states that energy cannot be created or destroyed but can be changed from one form to another.

Question 20

Activation Energy

Answer 20

The minimum amount of energy required to start a chemical reaction.

Question 21

Inhibitor

Answer 21

A substance that slows down or stops a chemical reaction.

Question 22

Catalyst

Answer 22

A substance that changes the rate of a chemical reaction without being used up or changed very much.