Recent activity by CDEMargherit

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What are the specific steps involved in the preparation of p-nitroaniline from aniline and nitric acid, and what are the optimal reaction conditions required to obtain a high yield of the desired product?

answered Feb 22 in Chemical synthesis

1 answer 32 views

What is the proper procedure for the preparation of p-nitroaniline using aniline and nitric acid as the starting materials, and how can the purity of the final product be confirmed using various analytical techniques?

asked Feb 22 in Chemical synthesis

1 answer 34 views

What is the most efficient way of synthesizing graphene oxide-based nanocomposites for use in water purification and how do the physical and chemical characteristics of the resulting material affect its performance?

answered Feb 21 in Materials Chemistry

1 answer 29 views

What is the effect of different solvents on the photochemical properties (fluorescence and excitation spectra) of a fluorescent dye?

answered Feb 19 in PhotoChemistry

1 answer 30 views

What is the bond enthalpy of the carbon-carbon double bond in ethene (C2H4) if it requires 615 kJ/mol of energy to break the bond?

answered Feb 18 in Chemical bonding

1 answer 28 views

How does the binding energy of a transition metal complex change as the metal's oxidation state increases, as determined by ab initio calculations?

asked Feb 17 in Computational Chemistry

0 answers 35 views

What polymers can be used to develop superabsorbent materials with high water retention capacity and how can their properties be optimized for specific applications?

asked Feb 14 in Polymer Chemistry

1 answer 37 views

How does plasma treatment affect the surface properties and wettability of biomaterials used in medical implant devices?

answered Feb 14 in Surface Chemistry

1 answer 34 views

What is the effect of metal substitution on the electrochemical and spectroscopic properties of metalloporphyrins and metallophthalocyanines? Provide examples and explain the trends observed.

answered Feb 13 in Coordination Chemistry

1 answer 65 views

How can the synthesis of metal-organic frameworks be optimized to improve crystallinity, stability, and yield?

asked Feb 11 in Materials Chemistry

1 answer 34 views

How can the insufficient emphasis on practical applications of chemistry in the classroom be addressed to better prepare students for real-world applications in the field of chemistry?

answered Feb 7 in Chemical education

1 answer 81 views

Determine the standard enthalpy change for the precipitation reaction of 10.0 g of calcium chloride (CaCl2) with excess sodium carbonate (Na2CO3) to form calcium carbonate (CaCO3) and sodium chloride (NaCl). Given the following standard enthalpies of formation: ΔHf°(CaCl2) = -795.8 kJ/mol, ΔHf°(Na2CO3) = -1130.1 kJ/mol, ΔHf°(CaCO3) = -1206.9 kJ/mol, and ΔHf°(NaCl) = -411.2 kJ/mol.

answered Feb 4 in Chemical thermodynamics

1 answer 74 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

1 answer 45 views

How does the acetylation of histone proteins affect the binding of transcription factors to DNA, and what role does this play in regulating gene expression?

answered Jan 30 in BioChemistry

1 answer 48 views

How can the practical applications of chemistry, such as developing new drugs or creating sustainable energy sources, be highlighted more effectively in chemistry education to motivate students to pursue careers in these areas?

answered Jan 30 in Chemical education

1 answer 137 views

A student needs to calculate the current density (in Amperes per square meter) of a copper electrode (Area = 10 cm²) in an electrochemical cell where the half-cell reaction is Cu²⁺ + 2e⁻ → Cu and the cell voltage is 1.1 V. The concentration of Cu²⁺ in the cell is 0.1 M.

answered Jan 22 in ElectroChemistry

1 answer 88 views

Please compare the trait and biological theories of personality.

answered Jan 20 in Psychology

1 answer 55 views

Please evaluate the groupthink phenomenon.

asked Jan 20 in Psychology

1 answer 82 views

How did Ivan Pavlov's dog experiment inform our understanding of classical conditioning?

asked Jan 20 in Psychology

1 answer 34 views

How did Pavlov's dog experiment demonstrate classical conditioning?

answered Jan 20 in Psychology

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