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How does changing the pH of a solution affect the formation of a complex ion using the example of [Cu(H2O)6]2+ forming [Cu(NH3)4(H2O)2]2+ at different pH values? Provide an explanation based on Le Chatelier's principle.

asked 5 days ago in Chemical equilibrium by StaceyAlbino (550 points)

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How does changing the concentration of reactants affect the rate and sustainability of a specific chemical reaction? Provide experimental evidence to support your answer.

asked 5 days ago in Chemical kinetics by QDHRoosevelt (190 points)

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Calculate the standard free energy change for the following redox reaction:2Fe^2+ (aq) + H2O2 (aq) + 2H+ (aq) -> 2Fe^3+ (aq) + 2H2O (l) Given the following reduction potentials at standard conditions:Fe3+ (aq) + e- -> Fe2+ (aq) E° = 0.77 VH2O2 (aq) + 2H+ (aq) + 2e- -> 2H2O (l) E° = 1.78 V

asked 5 days ago in Chemical thermodynamics by JarrodMorgan (290 points)

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Consider the following redox reaction:Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)Calculate the standard free energy change (ΔG°) for the reaction at 298K, given that the standard reduction potentials for Cu2+(aq)/Cu(s) and Ag+(aq)/Ag(s) are +0.34V and +0.80V, respectively.

asked 5 days ago in Chemical thermodynamics by RicoPlath139 (310 points)

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What is the effect of changing the concentration of one reactant on the equilibrium constant of a reaction with a known rate?

asked 5 days ago in Chemical kinetics by LeandroOxley (410 points)

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How does changing the molecular weight of polyethylene affect its mechanical properties, specifically in terms of its use as a biomaterial for joint replacements?

asked 5 days ago in Materials Chemistry by ArnetteLunds (470 points)

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Calculate the standard enthalpy change for the vaporization of 1 mole of water at 100°C and 1 atm pressure. The enthalpy of formation of liquid water is -285.8 kJ/mol and the enthalpy of formation of water vapor is -241.8 kJ/mol.

asked 5 days ago in Chemical thermodynamics by SheriFkw4940 (630 points)

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How does changing the mass of the atoms in a molecule affect its vibrational frequencies and infrared spectra, and how can quantum chemistry calculations be used to predict these changes?

asked 5 days ago in Quantum Chemistry by BrigitteTegg (610 points)

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How does changing the pH affect the equilibrium constant (Kf) for the formation of Fe(CN)6 4- complex ion in a solution containing Fe3+ and CN- ions? Provide a detailed explanation of the effect of pH on the equilibrium constant for the reaction.

asked 5 days ago in Chemical equilibrium by ChristalStro (470 points)

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What is the effect of changing the concentration of reactants and products on the equilibrium constant and reaction rate of a chemical reaction?

asked 5 days ago in Chemical kinetics by ChristenHold (390 points)

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Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid and sodium hydroxide, given the balanced chemical equation: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) and the enthalpy change of formation values: ∆Hf°(NaCl(aq)) = -407.3 kJ/mol ∆Hf°(H2O(l)) = -285.83 kJ/mol ∆Hf°(HCl(aq)) = -167.2 kJ/mol ∆Hf°(NaOH(aq)) = -469.11 kJ/mol

asked 5 days ago in Chemical thermodynamics by RobtLeighton (410 points)

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How does changing the concentration of reactants affect the reaction rate in the chemical reaction between hydrochloric acid and magnesium?

asked 5 days ago in Chemical kinetics by JerilynGeake (310 points)

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1 answer 6 views

Calculate the standard enthalpy change for the combustion of 1 mole of methane gas (CH4) under standard conditions given the following balanced chemical equation:CH4(g) + 2O2(g)→CO2(g) + 2H2O(g)(Standard conditions: temperature of 298K and pressure of 1 bar)

asked 5 days ago in Chemical thermodynamics by DylanEnglish (370 points)

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Calculate the rate constant at 300 K for a gas phase reaction with a rate of 0.025 M/s and an initial concentration of 0.10 M. The reaction is second order in the concentration of reactants.

asked 5 days ago in Physical Chemistry by TatianaDowli (550 points)

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Calculate the standard enthalpy change (∆H°) for the neutralization reaction of 50.0 mL of 0.100 M HCl with 75.0 mL of 0.0750 M NaOH at a constant pressure of 1 atm and a temperature of 25°C.

asked 5 days ago in Chemical thermodynamics by Erick9612932 (370 points)

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Calculate the standard electrode potential for the redox reaction where Ag(s) is oxidized by Cu2+(aq) to form Ag+(aq) and Cu(s) given that the standard reduction potential for Ag+(aq) + e- → Ag(s) is 0.80 V and for Cu2+(aq) + 2e- → Cu(s) is 0.34 V.

asked 5 days ago in Chemical thermodynamics by AmparoHaygoo (690 points)

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Calculate the reaction quotient, Qc, for the following reaction:2NO2(g) + 7H2(g) → 2NH3(g) + 4H2O(g)at a temperature of 300 K and a pressure of 0.5 atm for each gas species. The equilibrium constants, Kc, at the same temperature and pressure are:Kc = 0.0080 for the reverse reactionKc = 7.2 × 10^-7 for the forward reaction

asked 5 days ago in Chemical thermodynamics by MilagroEub10 (590 points)

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1 answer 6 views

Calculate the power output of a galvanic cell given that the cell potential is 1.8 V and the current passing through the circuit is 2.5 A. The electrochemical reaction taking place in the cell is the oxidation of Zinc and reduction of Copper. The standard reduction potentials are +0.76 V for copper and -0.76 V for zinc. The concentration of Zinc ions is 1.0 M whereas Copper ions concentration is 0.1 M. Determine the power output of the cell.

asked 5 days ago in ElectroChemistry by DillonNhl224 (450 points)

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Calculate the percent composition of phosphoric acid, H3PO4.

asked 5 days ago in Inorganic Chemistry by MadgeLemberg (310 points)

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How does changing the reactant concentration affect the efficiency of the reaction of hydrogen peroxide decomposition catalyzed by manganese dioxide?

asked 5 days ago in Chemical kinetics by RoxieFreeh1 (390 points)

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