Recent questions in Chemistry

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What is the density of a 25.0 mL solution of potassium chloride with a mass of 31.5 grams at 25°C?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the density of sodium chloride (NaCl) at a temperature of 25°C and a pressure of 1 atm? (Given: molar mass of NaCl = 58.44 g/mol, crystal structure of NaCl = face-centered cubic, unit cell edge length = 5.64 Å).

asked Mar 1 in Inorganic Chemistry 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 crystal field stabilization energy (CFSE) for a tetrahedral complex with ligand field splitting parameter (Δt) of 900 cm⁻¹ if it contains three unpaired electrons?

asked Mar 1 in Coordination Chemistry 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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1 answer 30 views

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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1 answer 33 views

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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1 answer 32 views

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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1 answer 27 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)

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1 answer 26 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)

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1 answer 37 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)

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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)

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1 answer 32 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)

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