Chem 111 Exam 3 Study Guide

Double displacement reaction

Parts from 2 compounds switch places to create 2 new compounds.

Precipitation reaction

A type of reaction that results in the formation of an insoluble product.

Chemical reaction

An overall process where reactants are transformed into products.

Ionic equation

A representation of reactions showing compounds separated with charges, with solids kept together.

Net ionic equation

An equation that removes spectator ions from the ionic equation.

Acid-Base reaction

A reaction involving an acid and a base, resulting in neutralization and often gas formation.

Oxidation

The process of losing electrons, leading to an increase in oxidation number.

Reduction

The process of gaining electrons, leading to a decrease in oxidation number.

Thermite reaction

A single displacement redox reaction that is exothermic and releases heat.

Joule

The amount of energy required to move 100 grams up 1 meter.

Calorie

The energy required to raise the temperature of 1 gram of water by 1 degree Celsius.

Energy Units

The measurement terms for energy, including Joules and Calories.

Exothermic

A process which releases heat, indicated by a negative delta H.

Endothermic

A process which absorbs heat, indicated by a positive delta H.

Enthalpy

The heat changes that occur at a constant pressure.

pH 7

Represents a neutral solution where moles of H+ (acid) equal moles of OH- (base).