Redox Reactions

Unit 8

1

Oxidation and Reduction Reactions

2

Reduction and Oxidation (Redox) reactions occur when the number of electrons in a compound changes

Reaction Type

Electron Flow Charge Reaction Electrons

are a

Reduction Gain Electrons

Become more

NegativeX + e- X- Reactant

Oxidation Lose Electrons

Become more

PositiveX X+ + e- Product

LEO = Lose Electrons OxidationSAYSGER = Gain Electrons Reduction

Redox Reactions and Oxidation States

3

Goal: Identify if a reaction is a redox reaction

2 NO + O2 2 NO2 Zn + 2 HCl ZnCl2 + H2

CO2 + H2O H2CO3 Zn + 2 AgNO3 Zn(NO3)2 + 2 Ag

Oxidation and Reduction Reactions

4

Write the reduction reaction and the oxidation reaction for each redox process

2 NO + O2 2 NO2 Zn + 2 HCl ZnCl2 + H2

CO2 + H2O H2CO3 Zn + 2 AgNO3 Zn(NO3)2 + 2 Ag