Recent questions in ElectroChemistry

0 votes

1 answer 26 views

The problem for the chemistry student to solve is: What is the corrosion rate of iron (Fe) in a sea environment if it loses 5 grams of mass during one month?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 25 views

What is the corrosion rate of a copper metal in a 0.1 M HCl solution at 25°C and atmospheric pressure if the electrode potential of the copper metal is -0.34 V and the current density is 0.35 mA/cm²?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 36 views

What is the corrosion potential of a zinc electrode immersed in a solution of 0.1 M ZnSO4, which is coupled with a copper electrode in a 0.1 M CuSO4 solution at 25°C? Given that the standard reduction potential for Zn2+ is -0.76 V and for Cu2+ is +0.34 V.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 39 views

What is the corrosion potential of a stainless steel (SS316) electrode in a 0.1 M sodium chloride (NaCl) solution at 25°C if the pH of the solution is 7.2? The standard reduction potential of SS316 is -0.71 V vs. a standard hydrogen electrode (SHE).

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 31 views

What is the corrosion potential of iron in a 0.1M HCl solution at 25 degrees Celsius, if the concentration of dissolved oxygen is 1.5 x 10^-4 M?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 33 views

What is the corrosion potential of iron in a 0.1 M solution of sulfuric acid at 25°C? Use the standard electrode potential values of Fe2+ and Fe3+ and the Nernst equation to calculate the potential value.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 21 views

What is the corrosion potential of a copper metal when it is submerged in seawater at 25°C with a pH level of 8.2? Use the Nernst equation to calculate the corrosion potential.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 37 views

What is the corrosion potential of a galvanic couple composed of a Zn metal and a Cu metal in a 1 M Cu2+ solution at 298 K when the Zn electrode is at -0.76 V and the Cu electrode is at +0.34 V?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 32 views

What is the value of the corrosion potential (E_corr) for a silver metal electrode in 0.1M silver nitrate (AgNO3) solution of pH 5.5 and temperature 25°C, assuming the electrode as standard hydrogen electrode (SHE) reference?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 32 views

What is the corrosion current density of a silver electrode in a 0.5M aqueous solution of NaCl at 25°C, given its polarization resistance of 125 Ω and an area of 20 cm²?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

0 answers 31 views

What is the corrosion current density of iron in a 0.1 M sulfuric acid solution at 25°C, given that the half-cell potential for the iron electrode is -0.44 V and the Tafel slope is 120 mV/decade?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 36 views

What is the corrosion current density of iron in a 0.1 M hydrochloric acid solution at 25 °C, if the corrosion potential of the metal is -0.44 V vs. the standard hydrogen electrode and the Tafel slope is 120 mV/decade of current density?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 31 views

What is the corrosion current density of Zinc (Zn) metal in a galvanic couple with Copper (Cu) in a 0.1 M KCl electrolyte solution at 25 °C, given that the open circuit potential of the couple is -0.439 V and the polarization resistance is 625 Ω?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 27 views

What is the corrosion current density of a steel pipe in a saltwater environment with a temperature of 25°C and a pH of 7.5, given that the corrosion potential is -0.85 V and the Tafel slope is 120 mV/dec?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 39 views

What is the corrosion current density of a copper metal in a galvanic couple with a silver metal in a 0.1 M solution of NaCl at 25°C, given that the open circuit potential is 0.34 V and the Tafel slope is 120 mV/decade for the copper electrode?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 31 views

Sure! Here's a precise problem:Calculate the cell potential for the following electrochemical reaction: Fe(s) + Cu2+(aq) → Fe2+(aq) + Cu(s) Assume that the concentrations of Fe2+(aq) and Cu2+(aq) are both 1.00 M and the temperature is 25°C.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 30 views

What is the cell potential for the following electrochemical reaction at 25°C? Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)Given: E° (Zn²⁺/Zn) = -0.76 VE° (Cu²⁺/Cu) = +0.34 V

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 37 views

What is the cathodic Tafel slope of a zinc electrode immersed in a solution of 0.1 M Zn2+ ions at 25°C, when the current density is 50 mA/cm²? The exchange current density for this reaction is known to be 1.2 x 10^-6 A/cm².

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 34 views

What is the anodic Tafel slope for the oxidation of Fe in a 0.1 M FeCl2 solution at a current density of 0.5 mA/cm2? Use the given data: T = 298 K, A = 0.2 cm2, and the exchange current density is 0.1 mA/cm2.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

0 votes

1 answer 28 views

What is the anodic Tafel slope for the oxidation of iron in a solution with a pH of 3? Given that the corrosion current density is 2.5 x 10^-6 A/cm2 and the overpotential is 0.2 V.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

Categories