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What is the expected pH of a 0.1 M solution of acetic acid (CH3COOH) with a pKa value of 4.76? Provide a detailed explanation of your answer, including any necessary calculations or formulas.

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

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What is the heat evolved or absorbed when 50.0 mL of 0.100 M nitric acid (HNO3) is neutralized with 50.0 mL of 0.100 M potassium hydroxide (KOH)? Given that the standard heat of neutralization for the reaction between HNO3 and KOH is -57.1 kJ/mol.

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

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What is the exchange current density for the oxidation of iron in a 0.1 M solution of Fe2+/Fe3+ at 25°C if the standard potential of the couple is +0.77 V and the overpotential is 0.2 V?

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

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What is the rate constant for the reaction A + B → C if the activation energy is 50 kJ/mol and the temperature is 300 K? Also, predict the order of reaction based on the mechanism proposed.

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

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What is the yield of p-nitroaniline obtained when 10 grams of aniline is reacted with a 10 mL of 70% nitric acid solution for 1 hour?

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

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What is the exchange current density for the oxidation of iron in a 0.1 M Fe2+(aq) solution at 25°C, assuming the standard electrode potential for the Fe2+/Fe3+ couple is +0.77 V? The rate constant for the reaction is 1.2x10^-5 cm/s.

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

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What is the surface area of a sample of activated carbon if it adsorbed 2.5 moles of nitrogen gas at 77 K and 1 atm pressure? The cross-sectional area of nitrogen gas is known to be 16.2 square angstroms.

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

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Sure, here's a problem for you:Consider the following reaction: N2 (g) + 3 H2 (g) ⇌ 2 NH3 (g)If the equilibrium concentrations of N2, H2 and NH3 are 0.25 M, 0.75 M and 0.50 M, respectively, calculate the equilibrium constant (Kc) for the reaction.

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

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What is the surface area of a sample of activated charcoal determined by gas adsorption using the BET method? Calculate the surface area of the activated charcoal sample given its mass, pore volume, and the adsorption isotherm data.

asked Mar 1 in Surface Chemistry 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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How can we modify the synthesis technique for carbon nanotubes to increase their purity and homogeneity?

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

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What is the wavenumber (cm^-1) of the fundamental vibrational mode of carbon dioxide using Fourier transform infrared spectroscopy?

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

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What is the standard enthalpy change for the fusion reaction of 2.5 grams of ice at 0 degrees Celsius?

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

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What is the enthalpy change for the combustion of methane gas in a bomb calorimeter?

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

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What is the enthalpy change for the combustion of methane gas (CH4) under standard conditions, given that the enthalpies of formation for CH4 and CO2 are -74.81 kJ/mol and -393.51 kJ/mol respectively?

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

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What is the enthalpy change when 2.5 moles of methane are burned completely in excess oxygen gas, given that the enthalpy of combustion of methane is -890 kJ/mol?

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

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1 answer 41 views

Sure, here's a precise question:Calculate the amount of heat required to vaporize 50 g of water at its boiling point (100°C) if its enthalpy of vaporization is 40.7 kJ/mol?

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

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How many structural isomers are possible for the coordination compound [Co(en)2Cl2]+, where en is ethylenediamine? Also, draw the structures of all the possible isomers.

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

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How effective are the United States Environmental Protection Agency's (EPA) regulations at protecting the environment from chemical pollutants?

asked Feb 28 in Environmental Chemistry by TheScientist (138k points)

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