Redox

Question 1

Oxidation

Answer 1

• gain of oxygen
• loss of hydrogen
• loss of electrons
• increase in oxidation number

Question 2

Reduction

Answer 2

• loss of oxygen
• gain of hydrogen
• gain of electrons
• decrease in oxidation number

Question 3

Oxidising agent

Answer 3

substance that oxidises another substance but is itself reduced

Question 4

Reducing agent

Answer 4

substance that reduced another substance but is itself oxidised

Question 5

Examples of oxidising agents

Answer 5

• Halogens
• Acidified H2O2
• O2
• Fe (III) salts
• Acidified KMnO4
• HNO3
• Acidified K2CR2O7
• Concentrated H2SO4

Question 6

Examples of reducing agents

Answer 6

• C
• CO
• H2
• SO2
• H2S
• Metals
• KI
• NH3
• Fe (II) salts