Chapter 17, Problem 78QRT

Interpretation Introduction

Interpretation:

The explanation for the faster corrosion of iron in salt water than in fresh water has to be written.

Concept Introduction:

The corrosion is the conversion of metal to its metal oxides or hydroxides.  Metals generally get corrode due to the oxidation-reduction reactions.  When iron gets corrode, there is a deposition of red-brown ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ over it which is commonly known as rusting.  The conditions require for rusting is the presence of air and water.