Chemical Reaction Types

Question 0

Synthesis

Answer 0

Small molecules or atoms are joined together to make a larger molecule.
A + B —> AB

Question 1

5 Patterns of Chemical Change

Answer 1

Allow us to predict what will be made in advance.

Question 2

Decomposition

Answer 2

A large molecule is taken apart to form a smaller molecule or atoms.
AB —> A + B

Question 3

Single Replacement (Displacement)

Answer 3

Switch the “like” ions. (Lover’s Triangle)
AB + C —> CB + A
+- + +- + or
-+ - -+ -

Question 4

Double Replacement (Displacement)

Answer 4

Switch + ions only. (Swingers)
AB + CD —> CB + AD
+- +- +- +-

Question 5

Combustion

Answer 5

When a hydrocarbon fuel reacts with oxygen to produce carbon dioxide and water vapor.
Ex. Methane + Oxygen —> Carbon Dioxide + Water
CH4 + 2O2 —> CO2 + 2H2O
(Oxygen, Nitrogen, & Sulfur are OK in a hydrocarbon)