Recent activity by JerroldCleve

1 answer 21 views

How does the molecular weight of a polymer affect its printability and mechanical strength in 3D printing?

answered 4 days ago in Materials Chemistry

1 answer 28 views

What is the effect of increasing the temperature on the equilibrium constant (K) for the formation of a complex ion when the reaction is exothermic? Provide numerical justification with an appropriate example.

asked 5 days ago in Chemical equilibrium

1 answer 23 views

How does the coordination environment of the metal ion in the active site of an enzyme affect its catalytic activity? Provide a specific example of a metalloenzyme and explain the role of coordination chemistry in its function.

asked 6 days ago in Coordination Chemistry

1 answer 8 views

How does the addition of different functional groups to the surface of a catalyst affect the reaction rate and selectivity of a specific catalytic reaction, as determined through Density Functional Theory calculations?

asked Feb 17 in Computational Chemistry

1 answer 32 views

How do proton pump inhibitors (PPIs) interact with clopidogrel (an antiplatelet drug) at the molecular level and how does this interaction affect the overall effectiveness of clopidogrel therapy?

asked Feb 14 in Medicinal Chemistry

1 answer 35 views

What is the effect of increasing the concentration of ammonia ligands on the formation of copper(II)ammonia complex ion? Provide a balanced chemical equation and calculate the equilibrium constant (Kf) for the reaction.

answered Feb 13 in Chemical equilibrium

1 answer 25 views

How does the change in concentration of the reactants in a second-order reaction affect the reaction rate?

asked Feb 13 in Chemical kinetics

1 answer 52 views

How can the process for producing fragrances in the chemical industry be optimized to minimize waste and increase production efficiency while maintaining the desired fragrance quality and composition?

asked Feb 10 in Chemical engineering

1 answer 44 views

How can magnetic resonance spectroscopy be used to determine the purity and concentration of a sample in organic chemistry?

asked Feb 6 in Physical Chemistry

1 answer 11 views

How can college chemistry courses be better designed to prepare students for chemistry-related careers, such as analytical chemistry or materials science, in order to reduce the skills gap between academic training and industry expectations?

answered Feb 6 in Chemical education

1 answer 70 views

How can the amount of lead in a water sample be quantified using voltammetry?

answered Jan 29 in Analytical Chemistry

1 answer 63 views

Calculate the lattice energy of calcium oxide (CaO) given the following information: - The ionic charges of calcium (Ca) and oxygen (O) are +2 and -2, respectively. - The distance between the Ca and O ions in the lattice is 2.36 Å. - The Madelung constant for CaO is 1.74.

answered Jan 23 in Inorganic Chemistry

1 answer 49 views

Calculate the exchange current density at the interface between a silver electrode and an aqueous solution of silver ions, given that the standard reduction potential for the Ag+/Ag half-cell is +0.80 V, the concentration of Ag+ in the solution is 0.025 M, and the temperature is 25°C.

asked Jan 23 in ElectroChemistry

1 answer 55 views

Calculate the enthalpy of formation of sodium chloride from its constituent elements, given the following thermochemical equations:2Na (s) + 1/2 O2 (g) -> Na2O (s) ΔH° = -414.1 kJ/mol Na2O (s) + 1/2 Cl2 (g) -> NaCl (s) ΔH° = -411.2 kJ/mol

asked Jan 23 in ThermoChemistry

1 answer 61 views

Calculate the corrosion current density of a metal M in a 0.5 M H2SO4 solution with a pH of 2.5, where the half-cell potential of the metal M is -0.8V and the standard hydrogen electrode potential is 0V. The temperature of the solution is 25°C and the density of the metal is 7.85 g/cm³.

asked Jan 23 in ElectroChemistry

1 answer 77 views

A student needs to analyze an unknown sample to determine the percent composition of three compounds present in it. The student conducts a combustion reaction to determine the percent of carbon and hydrogen in the sample. The remaining residue is then dissolved in water and the solution is titrated with a standardized silver nitrate solution to determine the chloride ion concentration in the sample. Calculate the percent composition of each compound in the unknown sample using mass balance calculations.

answered Jan 22 in Analytical Chemistry

1 answer 71 views

When did the DSM-5 change the GAF scale to the World Health Organization Disability Assessment Schedule WHODAS ?

asked Jan 20 in Psychology

1 answer 44 views

When does stress become harmful?

asked Jan 20 in Psychology

1 answer 11 views

What are the possible cognitive benefits of meditation for older adults?

answered Jan 20 in Psychology

1 answer 11 views

How can correlation analysis be used in psychology research?

asked Jan 17 in Psychology

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