Experiment 3

Corrosion

The process in which a metal, in its uncombined form, is transformed into oxides or some other metal salt because of its interaction with its surroundings (usually moisture in air).

Corrosion

It causes gradual deterioration/degradation of metals

Electrochemical

Corrosion is ___ in nature, and thus involves transfer of electrons in the presence of oxygen, but the process can be affected further by exposure to certain substances such as salts or other metals.

LEORA

Loss of Electron, Oxidation, Reducing Agend

GEROA

Gain of Electron, Reduction, Oxidizing Agent

Oxidation

Occurs at the anode (LEORA)

Reduction

Occurs at the Cathode (GEROA)

Oxidation occurs

There should be an anodic site

Reduction occurs

There should be a cathodic site

Acidic

Turns blue litmus paper to red

Basic

Turns red litmus paper to blue

Neutral

No change in the colors of the litmus paper

How to predict possible reaction based on reaction potential?

Identify first if the half-reaction is an oxidation reaction or a reduction reaction.