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How does changing the stoichiometry of reactants in a chemical reaction affect the rate of reaction, and how can we experimentally investigate this relationship?

asked Feb 3 in Chemical kinetics by MercedesLind (350 points)

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Calculate the reaction quotient (Qc) for the chemical equation:2NO(g) + O2(g) ⇌ 2NO2(g)At a certain reaction conditions, the concentrations of NO, O2, and NO2 are 0.45 M, 0.25 M, and 0.60 M respectively. Determine if the reaction is at equilibrium and, if not, in which direction will it proceed to reach equilibrium.

asked Feb 3 in Chemical thermodynamics by EdwardVmg820 (330 points)

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How does changing the stoichiometric ratio of reactants affect the reaction rate of the chemical reaction between acid and calcium carbonate?

asked Feb 3 in Chemical kinetics by ChristinaSim (350 points)

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How does changing the pH affect the equilibrium position of a redox reaction involving a weak acid and its conjugate base? Provide a specific example to illustrate your answer.

asked Feb 3 in Chemical equilibrium by JuliannRimme (390 points)

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How does changing the electronic and magnetic properties of molecular magnets affect their potential applications in fields such as data storage and spintronics?

asked Feb 3 in Quantum Chemistry by RogelioHaly (310 points)

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How does changing the pH affect the equilibrium position of an acid-base reaction between a weak acid and a strong base? Provide a brief explanation of the underlying principle and use an example to illustrate your answer.

asked Feb 3 in Chemical equilibrium by ShaunMacRory (250 points)

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Calculate the polarization that occurs in an electrochemical cell when a current of 2 A flows through it for 10 minutes. The electrode area is 25 cm², and the current efficiency is 95%. The activation energy is 80 kJ/mol, and the reaction quotient is 2.5 x 10⁻⁵. The temperature of the cell is 25°C. Find the polarization resistance and the total polarization of the cell.

asked Feb 3 in ElectroChemistry by Nate50Q22179 (230 points)

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How does changing the concentration of reactants and products affect the reaction rate of a reversible chemical reaction at equilibrium?

asked Feb 3 in Chemical kinetics by LashawnGoose (410 points)

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1 answer 34 views

How does changing the pH of a redox reaction affect the equilibrium position and what is the mathematical equation used to calculate the shift in equilibrium? Provide an example of a redox reaction and calculate the new equilibrium concentrations of the products and reactants when the pH is increased or decreased.

asked Feb 3 in Chemical equilibrium by MarcelO27806 (330 points)

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How does changing the concentration of reactants and products affect the reaction rate and equilibrium constant for the reaction between hydrogen and iodine?

asked Feb 3 in Chemical kinetics by Margot81P352 (450 points)

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Calculate the standard enthalpy change for the phase transition of water from liquid to ice at 0°C, given the following information: The molar heat capacity of liquid water, Cp = 75.3 J/mol K The molar heat capacity of ice, Cp = 36.6 J/mol K The enthalpy of fusion, ΔHfus = 6.01 kJ/mol

asked Feb 3 in Chemical thermodynamics by CorneliusSpe (470 points)

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Calculate the standard electrode potential of a half-cell containing F2(g) and F- ion at 25°C. The reduction potential for F2(g) is 2.87 V and the standard reduction potential for F- ion is -2.87 V.

asked Feb 3 in ElectroChemistry by NoraSneddon (390 points)

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Calculate the standard entropy change for the reaction 2H2(g) + O2(g) → 2H2O(g) given the standard entropy values of H2(g) = 130.6 J/mol K, O2(g) = 205.0 J/mol K, and H2O(g) = 188.8 J/mol K. Also, determine whether the reaction is spontaneous or not at 298 K.

asked Feb 3 in Inorganic Chemistry by DavidaTkm89 (150 points)

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1 answer 35 views

How does changing the concentration of reactants in a reaction mechanism impact the rate of the overall reaction?

asked Feb 3 in Chemical kinetics by CarsonTerrel (470 points)

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How does changing the molecular geometry affect the electronic excited states and optical properties of a molecule?

asked Feb 3 in Quantum Chemistry by BDLMichaela (270 points)

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Calculate the rate of the electrochemical reaction that takes place in the following electrolytic cell:Cu(s) | Cu2+(aq, 0.050 M) || Ag+(aq, 0.010 M) | Ag(s)Given that the current density is 0.500 A/m2 and the Faraday constant is 96,485 C/mol. The reduction potential of Cu2+(aq) + 2e- → Cu(s) is +0.34 V, and the reduction potential of Ag+(aq) + e- → Ag(s) is +0.80 V. Assume the temperature is 25°C and one-unit charge is exchanged.

asked Feb 3 in ElectroChemistry by AshleeB16686 (190 points)

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Calculate the standard enthalpy change for the fusion of 2.5 moles of ice at 0℃ to form water at 0℃. Given that the molar enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g·℃.

asked Feb 3 in Chemical thermodynamics by ChastityMcIn (650 points)

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Calculate the standard enthalpy change (ΔH°), standard entropy change (ΔS°) and standard Gibbs free energy change (ΔG°) of the reaction:2A(g) + 3B(g) → C(g) + 2D(g)given thatΔH°f[A(g)] = 200 kJ mol^-1Δ H°f [B(g)] = 100 kJ mol^-1Δ H°f [C(g)] = 400 kJ mol^-1Δ H°f [D(g)] = 0 kJ mol^-1ΔH°= -400 kJ mol^-1Temperature (T) = 298 KThe student needs to use their knowledge in quantum chemistry and thermodynamics to calculate the thermodynamic properties of the given reaction.

asked Feb 3 in Quantum Chemistry by Cathern38144 (570 points)

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1 answer 35 views

How does changing the concentration of reactants affect the selectivity of a chemical reaction?

asked Feb 3 in Chemical kinetics by AngelikaNoac (330 points)

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1 answer 34 views

What is the effect of changing the concentration of reactants or products on the reaction rate at equilibrium?

asked Feb 3 in Chemical kinetics by RenateBoelke (230 points)

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