Redox Reaction 1

CHEMISTRY  SSS2 Third Term

WEEK 5

Redox Reaction 1

Performance objectives

Students should be able to:

1. Define oxidation and reduction
2. Solve calculations on oxidation number

Content

Oxidation and Reduction

Oxidation and reduction in terms of oxygen transfer

• Oxidation is the gain of oxygen.
• Reduction is the loss of oxygen.
• For example, in the extraction of iron from its ore:

Fe2O3 + 3CO ----à 2Fe + 3CO2

Fe2O3 ----à 2Fe   ------à Reduction

3CO -------à 3C02 ------à Oxidation

Because both reduction and oxidation are occurring simultaneously, this is known as a redox reaction.

Oxidation and reduction in terms of hydrogen transfer

• Oxidation is the loss of hydrogen.
• Reduction is the gain of hydrogen.

Notice that these are…