Essentials of Materials Science and Engineering, SI Edition
Essentials of Materials Science and Engineering, SI Edition
4th Edition
ISBN: 9781337672078
Author: ASKELAND, Donald R., WRIGHT, Wendelin J.
Publisher: Cengage Learning
Question
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Chapter 18, Problem 18.1P
Interpretation Introduction

Interpretation:

Production of the electrochemical cell using a lemon, penny and galvanized steel.

Concept Introduction:

  • Electrochemical corrosion takes place when metal atoms become ions by losing electrons.
  • Electrochemical corrosion takes place in an aqueous solution where ions are present in water.
  • The process in which the electrochemical corrosion creates an electric circuit is known as an electrochemical cell.
  • An electrochemical cell is able to generate energy from a chemical reaction or uses energy to produce a chemical reaction.

Expert Solution & Answer
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Explanation of Solution

  • An electrochemical cell consists of an anode, cathode and an electrolytic solution.
  • An oxidation reaction occurs atthe anode, and a reduction reaction occurs at the cathode. The flow of ions takes place through the electrolyte.
  • Steel nail coated with zinc acts as an anode having a higher electronegativity value.
  • Electrons move from zinc to copper.
  • The penny acts as a cathode and contains lesser negative ions.
  • The lemon fluid acts as the electrolytic solution.
  • The chemical reaction between steel nail coated with zinc occurs in the lemon fluid.
  • Oxidation occurs in zinc.
  • Electrons are exchanged with zinc to obtain a lower energy value.
  • The released energy is conveyed to the electrochemical cell.

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