Classifying Chemical Reactions

A process in which substances are mixed but do not change

A change in which one or more substances are converted into new substances

A physical change where no new substances are formed

A process that only occurs in laboratories

Law of Conservation of Mass

Law of Definite Proportions

Law of Multiple Proportions

Law of Constant Composition

2H2O → 2H2 + O2

C + O2 → CO2

CH4 + 2O2 → CO2 + 2H2O

Na + Cl2 → 2NaCl

Single displacement involves one element replacing another in a compound.

Double displacement involves exchange of ions between two compounds.

Single displacement always produces a precipitate.

Double displacement can form a gas, water, or precipitate.

Loss of electrons

Gain of electrons

Loss of protons

Gain of neutrons

Removal of oxygen is reduction

Addition of oxygen is oxidation

Addition of oxygen is reduction

Removal of oxygen is oxidation