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How does changing the ligand in a coordination compound affect the compound's properties, and how can it be characterized using spectroscopic techniques?

asked Feb 3 in Coordination Chemistry by MillaFredric (1.5k points)

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Design a continuous stirred-tank reactor (CSTR) for the exothermic reaction of A + B → C with a rate constant of 0.05 L/mol/min. The reactor should produce a minimum of 500 g of C per minute, while maintaining a conversion of at least 90%. The feedstream of A and B is available with a flow rate of 2 L/min and an initial concentration of 1 M for both reactants. The reactor should be operated at a temperature of 50°C and a pressure of 1 atm. What should be the volume of the CSTR and the flow rate of the cooling medium used to maintain the desired temperature?

asked Feb 3 in Chemical engineering by Diana66S829 (1.6k points)

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How does changing the pH of a solution affect the rate of reaction between hydrochloric acid and sodium thiosulfate?

asked Feb 3 in Chemical kinetics by DeangeloMull (1.8k points)

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Consider the synthesis of ibuprofen from 2-methylpropylbenzene and carbon dioxide, using a series of reactions. As a chemistry student, how would you design an experimental process to isolate and purify ibuprofen from the reaction mixture? Include details on the specific equipment and techniques that can be used, as well as potential challenges and solutions.

asked Feb 3 in Chemical synthesis by LaunaBeyers (1.8k points)

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Calculate the standard enthalpy of formation of carbon dioxide (CO2) using the following information:C(graphite) + O2(g) -> CO2(g), ΔH° = -393.5 kJ/molC(graphite) + 2H2(g) -> CH4(g), ΔH° = -74.8 kJ/mol2H2(g) + O2(g) -> 2H2O(l), ΔH° = -572.0 kJ/mol

asked Feb 3 in ThermoChemistry by AleidaSeifer (1.7k points)

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1 answer 52 views

Calculate the standard Gibbs free energy change ($\Delta G^{\circ}$) for the following reaction at 298 K:2Fe(s) + 3/2O2(g) → Fe2O3(s) Given: Standard enthalpy of formation of Fe2O3(s) = -822.2 kJ/molStandard enthalpy of formation of Fe(s) = 0 kJ/molStandard entropy change for the reaction = +87.4 J/mol K

asked Feb 3 in Chemical thermodynamics by JackH2065356 (1.1k points)

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1 answer 54 views

Calculate the standard enthalpy change for the reaction: C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l), given the following standard enthalpies of formation: ΔHf°[C2H5OH(l)] = -277.69 kJ/mol, ΔHf°[CO2(g)] = -393.51 kJ/mol, ΔHf°[H2O(l)] = -285.83 kJ/mol.

asked Feb 3 in Chemical thermodynamics by JanellLunsfo (2.0k points)

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1 answer 55 views

Calculate the standard enthalpy change for the precipitation reaction: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) Given that the standard enthalpy of formation (∆Hf) for AgNO3(aq), NaCl(aq), AgCl(s), and NaNO3(aq) are -123.1 kJ/mol, -407.3 kJ/mol, -127.0 kJ/mol, and -467.3 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics by ClaritaTrive (2.4k points)

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Calculate the standard enthalpy change (∆H°) for the reaction between 50.0 mL of 0.100 M hydrochloric acid (HCl) and 50.0 mL of 0.100 M sodium hydroxide (NaOH), given that the temperature change was -5.01°C and the specific heat capacity of the solution is 4.18 J/g°C. The balanced chemical equation for the reaction is:HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)Note: Assume the density of the solutions is 1.00 g/mL and that the specific heat capacity of the solutions is the same as that of water.

asked Feb 3 in Chemical thermodynamics by Mose2866156 (1.6k points)

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1 answer 66 views

What is the effect of changing the size and shape of quantum dots and quantum wells on their electronic and optical properties, and how can these changes be calculated using quantum chemistry methods?

asked Feb 3 in Quantum Chemistry by YRPAbe659621 (2.3k points)

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1 answer 51 views

Can the unique photophysical properties of lanthanide complexes be harnessed for efficient light harvesting and photocatalysis? Explore the photochemical properties of selected lanthanide complexes to demonstrate their potential applications in these fields.

asked Feb 3 in PhotoChemistry by NickolasShum (1.9k points)

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1 answer 54 views

Calculate the standard enthalpy change for the reaction where 50 ml of 0.1 M hydrochloric acid reacts with 50 ml of 0.1 M sodium hydroxide solution. The temperature change observed during the reaction was 5°C and the specific heat capacity of the solution is 4.18 J/g°C.

asked Feb 3 in Chemical thermodynamics by PriscillaLaf (1.6k points)

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1 answer 59 views

Calculate the standard enthalpy and standard entropy change at 298 K for the following reaction: 2Fe(s) + 3/2O2(g) → Fe2O3(s) Given that the standard enthalpies of formation for Fe(s), O2(g), and Fe2O3(s) are 0 kJ/mol, 0 kJ/mol, and -826 kJ/mol respectively. Also, the standard molar entropy of Fe2O3(s) is 87.4 J/K/mol.

asked Feb 3 in Inorganic Chemistry by AbbieGladden (2.1k points)

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1 answer 53 views

Calculate the standard enthalpy change of the formation of water (H2O) given the following data:- Standard enthalpy of formation of hydrogen gas (H2) = 0 kJ/mol- Standard enthalpy of formation of oxygen gas (O2) = 0 kJ/mol- Standard enthalpy of formation of water vapor (H2O(g)) = -241.8 kJ/mol

asked Feb 3 in Chemical thermodynamics by Precious09K0 (2.0k points)

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1 answer 52 views

Calculate the standard entropy change for the reaction: 2H2 (g) + O2 (g) -> 2H2O (g) given the standard enthalpy of formation of H2O (g) is -241.8 kJ/mol at 298 K.

asked Feb 3 in Inorganic Chemistry by CalvinHornin (1.6k points)

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1 answer 67 views

What is the effect of changing the orientation of reactants on the reaction rate of a chemical reaction?

asked Feb 3 in Chemical kinetics by DanielPidgeo (2.1k points)

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1 answer 48 views

Design a distillation column that can separate a mixture consisting of 40% acetone, 30% methanol, and 30% ethanol with a feed rate of 100 mol/h. The distillate should consist of at least 98% acetone, and the bottom product should contain no more than 1% acetone. You may assume that the column operates at a constant pressure and has 20 equilibrium stages. Determine the reflux ratio and the number of trays required to achieve this separation.

asked Feb 3 in Chemical engineering by WilfredoWren (2.1k points)

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1 answer 51 views

Calculate the standard potential of the cell Ag(s) | Ag+(aq, 0.0100 M) || Cu2+(aq, 1.00 M) | Cu(s) at 25°C.

asked Feb 3 in ElectroChemistry by StanGjo3033 (1.9k points)

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1 answer 13 views

Design a storage and transportation system for the safe handling of hydrochloric acid, a hazardous chemical commonly used in the chemical industry. Your system should include all the necessary equipment, materials, and procedures, and should be in compliance with regulatory standards for the storage and transportation of hazardous chemicals. Additionally, address any potential risks or hazards associated with the storage and transportation of the chemical and explain how these risks will be mitigated.

asked Feb 4 in Chemical engineering by YRPAbe659621 (2.3k points)

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1 answer 69 views

What is the effect of changing the concentration of the reaction intermediate on the overall rate of a chemical reaction?

asked Feb 3 in Chemical kinetics by DerrickKong0 (1.7k points)

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