Recent activity by ErickAshton2

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How does the size and charge of particles in a colloid system affect the stability and interactions between particles in the system?

answered 3 days ago in Physical Chemistry

1 answer 19 views

How do the physical properties of ionic liquids change with different cation and anion combinations?

answered 6 days ago in Physical Chemistry

1 answer 21 views

How does the pH of a solution affect the formation of a complex ion? Provide an explanation and example using the coordination reaction between a copper (II) ion and ammonia.

asked 6 days ago in Chemical equilibrium

1 answer 24 views

What is the optimal ratio of diisocyanate to polyol for the synthesis of polyurethane with optimal mechanical properties?

answered 6 days ago in Chemical synthesis

1 answer 28 views

How do the mechanical and thermal properties of polymer-based composites used in aerospace applications vary with the type and concentration of reinforcing materials such as carbon fibers or nanoparticles?

asked Feb 20 in Polymer Chemistry

1 answer 25 views

What is the effect of temperature on the fluidity of cell membranes?

asked Feb 20 in BioChemistry

1 answer 34 views

What is the best protecting group for the hydroxyl group in a molecule containing both alcohol and carboxylic acid functionalities that needs to undergo selective chemical modification of only one of these functionalities, and why?

answered Feb 17 in Organic Chemistry

1 answer 53 views

How can the sensitivity of surface-enhanced Raman spectroscopy (SERS) be optimized for the detection of trace amounts of organic molecules on a metallic surface?

asked Feb 10 in Surface Chemistry

1 answer 10 views

How can the production process for nitrogen gas be optimized for cost-efficiency and reduced environmental impacts in an industrial setting?

answered Feb 10 in Chemical engineering

1 answer 30 views

How can the molecular weight of a biodegradable polymer be controlled during its synthesis process, and what are some methods that can be used to ensure the resulting polymer will have the desired physical and chemical properties for its intended application?

asked Feb 10 in Polymer Chemistry

1 answer 38 views

How can the mechanical properties and biocompatibility of polymer-based materials used in 3D printing be optimized for biomedical applications?

answered Feb 10 in Polymer Chemistry

1 answer 39 views

How can medicinal chemists utilize structure-activity relationship (SAR) studies to design new small molecule drugs that selectively target specific immune cells involved in autoimmune diseases, while minimizing off-target effects and toxicity?

asked Feb 6 in Medicinal Chemistry

1 answer 41 views

How can chemistry educators improve the emphasis on safety protocols in chemistry labs to ensure that students are better prepared for chemical hazards that can occur during experiments and research?

answered Feb 4 in Chemical education

1 answer 47 views

Here's a problem for the student to solve:Design a remediation plan for a hypothetical contaminated site that has been contaminated with heavy metals. Discuss the various treatment options available for the site, the advantages and disadvantages of each option, and the costs associated with each option. Finally, recommend a remediation strategy that you think would be the most effective and economically feasible for the site.

answered Feb 4 in Environmental Chemistry

1 answer 38 views

Determine the bond order and bond length of the nitrogen-oxygen bond in the nitrate ion (NO3-).

asked Feb 4 in Inorganic Chemistry

1 answer 56 views

Design a retrosynthetic pathway to synthesize ibuprofen starting from methylcyclohexane. Show all necessary reagents and the key steps involved in the synthesis.

asked Feb 4 in Organic Chemistry

1 answer 31 views

Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) in aqueous solutions. The balanced chemical equation for the reaction is as follows:HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) Given the enthalpy of formation for HCl(aq) is -167.2 kJ/mol, NaOH(aq) is -469.14 kJ/mol, NaCl(aq) is -407.3 kJ/mol, and H2O(l) is -285.83 kJ/mol. The reaction is carried out at standard temperature and pressure.

asked Feb 3 in Chemical thermodynamics

1 answer 50 views

Calculate the reaction quotient, Qc, for the reaction: 2 NO2 (g) + Cl2 (g) ⇌ 2 NO2Cl (g)At a certain temperature, the concentrations were found to be: [NO2] = 0.15 M, [Cl2] = 0.20 M, and [NO2Cl] = 0.10 M.Is the reaction at equilibrium? If not, which direction would the reaction proceed to reach equilibrium?

asked Feb 3 in Chemical thermodynamics

1 answer 67 views

What is the concentration of an HCl solution if 25.0 ml of the solution requires 35.0 ml of 0.10 M NaOH solution to reach the endpoint of titration?

answered Jan 30 in Analytical Chemistry

1 answer 53 views

How can UV-Vis spectroscopy be used to identify the presence of specific functional groups in a compound, such as aldehydes or ketones? What are the characteristic absorbance wavelengths for these functional groups, and how can their presence be confirmed through spectral analysis?

answered Jan 29 in Analytical Chemistry

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