Recent questions in Chemistry

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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)

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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)

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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)

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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)

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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)

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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)

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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)

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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)

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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)

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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)

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What is the conductivity of a 0.1 M solution of sodium chloride at 25°C?

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

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What is the equilibrium constant for the formation of a complex ion [Fe(SCN)6]3- when mixing 0.1 M Fe(NO3)3 and 0.1 M KSCN? The absorbance of the [Fe(SCN)6]3- ion at 450 nm is found to be 0.60. Calculate the concentration of [Fe(SCN)6]3-.

asked Mar 1 in Chemical equilibrium by TheScientist (138k points)

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What is the change in equilibrium constant for the formation of a complex ion when the temperature is increased from 25°C to 50°C, given that the enthalpy of reaction is -20 kJ/mol and the entropy change is 80 J/(mol·K)?

asked Mar 1 in Chemical equilibrium by TheScientist (138k points)

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What is the change in pH when a strong acid is added to a buffer solution containing a weak acid and its conjugate base, given the initial concentrations and Ka of the weak acid?

asked Mar 1 in Chemical equilibrium by TheScientist (138k points)

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What is the change in internal energy of a system when two moles of hydrogen gas react with one mole of oxygen gas to form two moles of water vapor at constant temperature and pressure?

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

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What is the change in entropy when 2 moles of hydrogen gas react with 1 mole of oxygen gas to form 2 moles of water vapor at 298 K and 1 atm pressure?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the change in entropy when 2 moles of H2 (g) react with 1 mole of O2 (g) to form 2 moles of H2O (l) at a constant temperature of 298 K? (Assume standard molar entropy values for the reactants and products)

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the change in entropy (ΔS) when 1 mole of hydrogen gas (H2) reacts with 1 mole of chlorine gas (Cl2) to form 2 moles of hydrogen chloride gas (2HCl) at a temperature of 298 K and a pressure of 1 atm?

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

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What is the change in entropy for the reaction 2H2(g) + O2(g) → 2H2O(g) at a temperature of 298 K?Given the standard entropy values of H2(g), O2(g), and H2O(g) are 130.6 J/K/mol, 205.0 J/K/mol, and 188.7 J/K/mol respectively.

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

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What is the change in enthalpy when 2 moles of iron(III) oxide are reduced to iron metal in the presence of hydrogen gas? (Given: ΔH°f[Fe2O3] = -824.2 kJ/mol, ΔH°f[Fe] = 0 kJ/mol)

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

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