Homework Help is Here – Start Your Trial Now!
Science
Chemistry
3. A steel plate of area 100 cm² steel is undergoing a corrosion process resulting in a weight change of 2.89 x 10-5 gm/s. The equivalent current density associated with this process is a. 10 mA/cm² b. 1 mA/cm² c. 100 mA/cm² d. 0.10 mA/cm²

3. A steel plate of area 100 cm² steel is undergoing a corrosion process resulting in a weight change of 2.89 x 10-5 gm/s. The equivalent current density associated with this process is a. 10 mA/cm² b. 1 mA/cm² c. 100 mA/cm² d. 0.10 mA/cm²

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question
Solve 3 please
q=ce where q is the charge density and E is the electrochemical potential. In cyclic voltammetry, the effect of increasing the potential sweep rate, dE/dt (t is time) is to a. increase the current density. b. increase the rate of the corresponding oxidation/reduction c. increase the charge transfer resistance. d. all of the above. process. 3. A steel plate of area 100 cm² steel is undergoing a corrosion process resulting in a weight change of 2.89 x 10-5 gm/s. The equivalent current density associated with this process is a. 10 mA/cm² b. 1 mA/cm² c. 100 mA/cm² d. 0.10 mA/cm² 4. The thermodynamics of a passivation process can be examined using a. mixed potential theory or Evan's diagrams. b. Potential-pH or Pourbaix diagrams. c. linear sweep voltammetry. d. the electrochemical series of reduction potentials. 5. Consider the electrochemical cell: Cu/10-4 M Cu²+, 1M H*/Pt/H₂ (a=1). Determine the equilibrium potential versus the indicated reference electrode. a. 0.342 V. b. 0.082 V. c. 0.222 V. 0.462 V.
Transcribed Image Text:q=ce where q is the charge density and E is the electrochemical potential. In cyclic voltammetry, the effect of increasing the potential sweep rate, dE/dt (t is time) is to a. increase the current density. b. increase the rate of the corresponding oxidation/reduction c. increase the charge transfer resistance. d. all of the above. process. 3. A steel plate of area 100 cm² steel is undergoing a corrosion process resulting in a weight change of 2.89 x 10-5 gm/s. The equivalent current density associated with this process is a. 10 mA/cm² b. 1 mA/cm² c. 100 mA/cm² d. 0.10 mA/cm² 4. The thermodynamics of a passivation process can be examined using a. mixed potential theory or Evan's diagrams. b. Potential-pH or Pourbaix diagrams. c. linear sweep voltammetry. d. the electrochemical series of reduction potentials. 5. Consider the electrochemical cell: Cu/10-4 M Cu²+, 1M H*/Pt/H₂ (a=1). Determine the equilibrium potential versus the indicated reference electrode. a. 0.342 V. b. 0.082 V. c. 0.222 V. 0.462 V.
Expert Solution
Step 1: step 1 of 2

To calculate the equivalent current density associated with this process, we can use the following equation:

Currentdensity(mA/cm²)=(Weightchange(g/s))/(Molarmass(g/mol)∗Numberofelectronstransferred(mol/electron)∗Faradayconstant(C/mol∗electron))

Given:

  • Weight change (g/s) = 2.89 x 10⁻⁵ gm/s
  • Molar mass of iron (g/mol) = 55.845
  • Number of electrons transferred per iron atom (mol/electron) = 2
  • Faraday constant (C/mol * electron) = 96,485


steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS