Recent questions in ElectroChemistry

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What is the exchange current density for the oxidation of copper in a 0.1 M copper sulfate solution at 25°C using a platinum electrode?

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

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What is the exchange current density for a corroding iron electrode in a 0.1 M solution of Fe2+ ions at 25°C, given that the rate constant for the electrode reaction is 1.2 x 10^-9 cm/s and the standard reduction potential for Fe2+/Fe is -0.44 V?

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

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What is the exchange current density for a copper electrode in contact with a 1M solution of CuSO4 at a temperature of 25°C if the electrode potential is measured to be 0.25 V versus the standard hydrogen electrode?

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

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What is the efficiency of an electrochemical cell with a standard potential of +0.80V and a current of 2.5A, when the cell potential drops to +0.60V as a result of an internal resistance of 1.2Ω?

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

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What is the efficiency of an electrochemical cell in which a current of 1.5 A is passed for 2 hours between two electrodes, given that the potential difference between the electrodes is 1.5 V and the total energy consumed is 5400 Joules?

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

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What is the efficiency of an electrochemical cell that operates with a potential difference of 1.5V and has a maximum electrical work output of 2500 J when 10 moles of electrons are transferred in the cell reaction? (Assuming no other energy losses)

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

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What is the efficiency of an electrochemical cell with a voltage of 0.8V and a current of 2 mA when Cu and Ag electrodes are used in a CuSO4 and AgNO3 electrolyte solution, with an electrode area of 10cm² and a duration of 3 hours?

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

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What is the efficiency of an electrochemical cell with a standard potential of 1.5V when the measured potential is 1.2V and the current passing through the cell is 0.5A for 2 hours? (Assume the cell is operating under standard conditions.)

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

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What is the current density (in A/cm²) of a copper electrode in contact with a 1 M solution of CuSO₄ at 25°C, assuming that the reduction of Cu²⁺ to Cu has an exchange current density of 10⁻⁶ A/cm² and a concentration overpotential of 20 mV?

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

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What is the current density in an electrochemical cell where the cell potential is 1.2 V and the concentration of the reduced species is 0.035 M? Given that the electrode area is 5 cm² and the Faraday constant is 96485 C/mol.

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

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What is the corrosion rate of a copper metal in a seawater environment if the weight loss after 30 days of exposure is found to be 0.25 grams? (Assume a surface area of 10 cm2 and a density of copper as 8.96 g/cm3).

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

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What will be the corrosion rate of iron in a hydrochloric acid solution if a piece of iron with a surface area of 10 cm² loses 0.5 grams of mass after being immersed in the solution for 24 hours? Show your calculation with correct units.

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

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What is the corrosion rate of a zinc electrode coupled to a copper electrode in a 0.1 M aqueous solution of NaCl if the galvanic couple has a potential of 0.8 V and a surface area of 4 cm² for the zinc electrode?

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

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What is the corrosion rate of a steel rod with a surface area of 10 cm2 in a solution of 0.1 M HCl at 25◦C if the current passing through the rod is 0.5 A for 5 hours? The atomic weight of steel is 56 g/mol and its density is 7.86 g/cm3.

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

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What is the corrosion rate of a steel bar in a 1 M solution of sulfuric acid at 25°C, if the bar surface area is 50 cm² and the weight loss of the bar after 24 hours of immersion in the acid is found to be 2.1 grams?

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

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What is the corrosion rate of a copper metal in a saline environment containing 0.5 M of NaCl solution, if the mass of the copper electrode decreases by 0.5 grams after 24 hours of exposure to the solution at room temperature (25 °C)?

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

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What is the corrosion rate of iron in a 1M HCl solution at 25°C given its weight loss of 2.3 grams over a period of 48 hours? The atomic weight of iron is 55.85 g/mol and its density is 7.87 g/cm³.

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

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What is the corrosion rate of iron in a 0.1M HCl solution at 25°C, given that the corrosion potential of the iron electrode is -0.44V vs. SHE and the Tafel slopes for the anodic and cathodic reactions are 60mV/dec and 120mV/dec, respectively?

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

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What is the corrosion rate of iron in a 0.1 M HCl (hydrochloric acid) solution at room temperature (25°C) if it loses 5 grams of mass after being immersed in the solution for 2 hours?

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

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What is the corrosion rate of iron in a 0.1 M HCl solution at 298 K, given that the corrosion potential is -0.44 V and the current density is 1.2 mA/cm²?

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

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