Mr. Blanks 9th grade Physical Science Unit 4

chemical reaction

A change in which one or more substances are converted into a new substance is called a

double-displacement reaction

If a precipitate, water, or a gas forms when two ionic compounds in solution are combined, the reaction is

inhibitor

A substance that prevents certain chemical reactions is a

synthesis reaction

when two or more substances combine in a chemical reaction to form another substance
A+B=>AB

decomposition reaction

The breakdown of a substance into two or more simpler substances is a
AB=>A+B

reactants

In a chemical equation, the substances that react are called

catalyst

A substance that speeds up a chemical reaction without itself being permanently changed is a

endothermic reaction

A reaction the requires energy in the form of heat is a

single-displacement reaction

When one element replaces another in a compound
A+BC=>AC+B

exothermic reaction

If the energy released in a chemical reaction is primarily in the form of heat, that reaction is a

coefficients

Numbers in front of the symbols and formulas in an equation that represent the number of units of each substances taking part in a reactio is called

balanced

If the number of atoms of each element on the left side of an equation is equal to the number of atoms of each element on the right side of the equation, the equation is

products

In a chemical equation the substances that are produced are called

precipitate

An insoluble solid that forms when two ionic compounds in solution are combined is a
AB+CD=>AD+CB

(s)

solid

(l)

liquid

(aq)

aqueous solution

(g)

gas

combustion reaction

This reaction occurs when a substance reacts with oxygen to produce energy in the form of heat and light

active series

A metal will replace any other metal that is less active

Law of Conservation of Mass

The mass of the products always equals the mass of the reactants

chemical equation

a way to describe a chemical reaction using chemical formulas and other symbols

balancing chemical equations

balance one chemical equation everytime you get to this flashcard