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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 standard enthalpy change for the reaction 2SO2(g) + O2(g) → 2SO3(g) at 25°C and 1 atm pressure, given the following enthalpy of formation values: ΔfH°[SO2(g)] = -296.8 kJ/mol, ΔfH°[O2(g)] = 0 kJ/mol, and ΔfH°[SO3(g)] = -395.72 kJ/mol?

asked Mar 1 in Chemical thermodynamics 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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What chemical modifications can be made to the structure of conductive polymers in order to improve their conductivity and make them suitable for use in flexible electronic devices?

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

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What is the lattice energy of magnesium oxide (MgO) given that the ionization energy of Mg is 738 kJ/mol, the electron affinity of O is -141 kJ/mol, and the distance between the ions in MgO is 2.1 Å? Show your work and units.

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

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What is the standard free energy change for the redox reaction of 2 Fe^2+(aq) + Cl2(g) → 2 Fe^3+(aq) + 2 Cl^-(aq) at 298 K?

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

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What is the formal charge on the oxygen atom in the sulfate ion (SO4 2-)? Show your calculation and explain how you arrived at your answer based on the shared and unshared electrons in the molecule.

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

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What is the pH of a 0.1 M solution of acetic acid?

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

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What are the factors that affect the degree of color change in a photochromic material, and how can these factors be controlled and optimized for practical applications such as eyeglasses or windows?

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

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How can we decrease the energy loss caused by the recombination of charged carriers in polymer-based photovoltaic materials, thereby improving their efficiency as solar cells?

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

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How can we effectively remove persistent organic pollutants (POPs) from contaminated soil and water sources for the purpose of environmental cleanup and protection?

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

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What is the monolayer capacity of a sample of activated alumina with a surface area of 200 m2/g, using the BET theory of multilayer adsorption and assuming a specific surface area of 16.2 × 10-20 m2 for nitrogen at 77 K?

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

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What is the energy difference between the ground state and first excited state of the hydrogen atom using quantum chemical calculations?

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

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What is the step-by-step chemical process for synthesizing polyvinyl chloride from vinyl chloride monomer, and how can the purity and yield of the final product be optimized?

asked Feb 28 in Chemical synthesis by TheScientist (138k points)

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What are the most effective and safe methods for disposing of radioactive waste that minimize impact on the environment and human health?

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

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What is the enthalpy change of dissolving 10 grams of sodium chloride (NaCl) in 100 ml of water, given that the final temperature of the solution is 25°C and the initial temperature of the water was 20°C?

asked Mar 1 in ThermoChemistry 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 theoretical yield of acetylsalicylic acid that can be obtained from 5 grams of salicylic acid and 10 grams of acetic anhydride, assuming a 100% conversion rate and perfect reaction conditions?

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

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What is the heat capacity of 50 grams of water at a temperature of 25°C, given that the specific heat of water is 4.18 J/g•°C?

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

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What is the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(g), given that the bond enthalpy of H-H, O=O, and H-O are 436 kJ/mol, 498 kJ/mol, and 464 kJ/mol, respectively?

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

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