Chapter 11 Chemistry Study Guide

Chemical equation
An expression representing a chemical reaction

Catalyst
A substances that increases the rate of reaction by lowering the activation energy barrier; not used in the reaction

Coefficient
A small whole number that appears in front of a formula in a balanced chemical equation

Balanced equation
A chemical equation in which mass is conserved; each side of the equation has the same number of atoms in each element

Reactants
A substance present at the start of a reaction

Products
A substance produced in a chemical reaction

Combination reaction
A chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat and light

Decomposition reaction
A chemical change in which a

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single compound is broken down into two or more simpler products

Single replacement reaction
A chemical reaction in which one element replaces a second element in a compound

Double replacement reaction
A chemical change that involves an exchange of positive ions between two compounds

Combustion reaction
A chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat and light

Hydrocarbon
An organic compound that contains only carbon and hydrogen

Aqueous solutions
Water that contains dissolved substances

Precipitate
A solid that forms and settled out out of a liquid mixture

Complete ionic equation
An equation that shows dissolved ionic compounds as dissociated free ions

Spectator ion
An ion that is not directly involved in a chemical reaction; an ion that does not change oxidation number or composition during a reaction

Net ionic equation
An equation for a reaction in solution showing only those particles that are directly involved in the chemical change

Solubility
The amount of a substance that dissolves in a given quantity of solvent at specified conditions of temperature and pressure to produce a saturated solution

Soluble
Able to be dissolved

Insoluble
Not able to be dissolved

Alkali metals
Any metal in group 2A of the periodic table

Ionic compound
A compound composed of positive and negative ions

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