Types of Chemical Reactions

Question 1

Synthesis

Answer 1

A compound formed from the 2 reactants

A + B = AB

Question 2

Decomposition

Answer 2

Elements or smaller compounds. Not easy to predict

AB = A + B

Question 3

Single Displacement

Answer 3

Metal element will replace the metal in the compound or non-metal will replace the non-metal in the compound

A + CD = C + AD (if metal)
Or
D + CA (if non-metal)

Question 4

Double Displacement

Answer 4

The first part of each compound will switch places to form 2 different compounds

AB + CD ——> AD + CB

• switching alike ones only

Question 5

Neutralization

Answer 5

A type of double Displacement reaction. The products will be H2O and a salt

Acid + Base = water and salt

HA + BOH = H2O + BA

Question 6

Combustion

Answer 6

Complete Combustion: products are H2O and CO2
Incomplete combustion: products will also include C and CO

xHg + O2 —–> CO2 + H2O (complete)

CxHy + O2 —–> CO2 + H2O + CO + C (incomplete)

Question 7

Top 7 Acids used

Answer 7

• HBr
• HI
• HF
• H3PO4
• H2SO4
• HCl
• HNO3