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0
votes
21
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What is the mechanism that governs the photochemical stability of quantum dots, and how can this be optimized for potential use in optoelectronics and biomedical applications?
answered
3 days
ago
in
PhotoChemistry
0
votes
20
views
What is the optimal temperature and time required for the synthesis of highly stable CdSe quantum dots using the colloidal method, and how do these parameters affect the size and properties of the quantum dots synthesized?
answered
4 days
ago
in
Materials Chemistry
0
votes
18
views
How does the molecular weight of a polymer affect its melt viscosity and elasticity, as determined by rheological testing methods?
answered
4 days
ago
in
Polymer Chemistry
0
votes
30
views
What is the major difference between primary, secondary and tertiary amines? Provide a detailed mechanism to explain the reaction that occurs when a primary amine reacts with carboxylic acid to form an amide.
answered
5 days
ago
in
Organic Chemistry
0
votes
29
views
How does the color of a dye or pigment change when exposed to different wavelengths of light, and what are the underlying photochemical mechanisms?
answered
Feb 18
in
PhotoChemistry
0
votes
35
views
How does the change in pH affect the rate of photochemical reactions in the presence of a photo-sensitizer thus causing a photo-induced electron transfer to occur?
answered
Feb 18
in
PhotoChemistry
0
votes
19
views
How would the addition of a catalyst affect the equilibrium position of the redox reaction between iron(III) ions and iodide ions in aqueous solution?
answered
Feb 17
in
Chemical equilibrium
0
votes
27
views
How can we use size-exclusion chromatography for determining the molecular weight distribution of polymers?
answered
Feb 14
in
Polymer Chemistry
0
votes
31
views
How can we improve the size and uniformity of quantum dots synthesized through a low-cost, environmentally friendly approach?
answered
Feb 13
in
Materials Chemistry
0
votes
8
views
How can we design a polymer-based optical material with enhanced light absorption properties for solar cell applications?
answered
Feb 12
in
Polymer Chemistry
0
votes
46
views
How can the stability of colloidal suspensions be altered by changing the particle size or surface charge, and what are the practical applications of these modifications?
answered
Feb 10
in
Physical Chemistry
0
votes
32
views
How can the efficiency of the system for the production of hydrogen fuel be optimized, while minimizing energy consumption and cost?
answered
Feb 7
in
Chemical engineering
0
votes
36
views
How can the efficiency of a paint production system be improved by optimizing the mixing process and reducing the waste generated during the manufacturing process?
answered
Feb 7
in
Chemical engineering
0
votes
36
views
How can the carbon footprint of our daily activities be measured, and what are some practical steps that can be taken in order to reduce our carbon footprint and minimize its impact on the environment?
answered
Feb 6
in
Environmental Chemistry
0
votes
38
views
How can researchers develop a new treatment for cardiovascular diseases that effectively targets specific pathways or receptors within the body while avoiding potential off-target effects that may cause harm to the patient? What specific chemical compounds or modifications could be used to achieve this goal, and how can their efficacy and safety be tested in preclinical and clinical studies?
answered
Feb 5
in
Medicinal Chemistry
0
votes
43
views
How can chemistry students improve their exposure to current research in chemistry, and what strategies can they use to stay up to date with recent advancements in the field?
answered
Feb 5
in
Chemical education
0
votes
35
views
Calculate the standard enthalpy change for the dissolution of 10 grams of potassium hydroxide (KOH) in 100 mL of water. Given that the molar enthalpy of dissolution of solid KOH is -57.61 kJ/mol and the density of water is 1 g/mL.
answered
Feb 3
in
Chemical thermodynamics
0
votes
34
views
How does changing the pH of a solution affect the equilibrium position of an acid-base reaction when starting with HF (hydrofluoric acid) and NaOH (sodium hydroxide)?
answered
Feb 3
in
Chemical equilibrium
0
votes
59
views
Calculate the enthalpy change for the polymerization of polyethylene using the following information: ΔHf° of ethylene (-20.4 kJ/mol) and polyethylene (-1024 kJ/mol); the reaction equation: nC2H4 (g) → [-CH2-CH2-]n (s)
answered
Jan 23
in
ThermoChemistry
0
votes
61
views
A chemistry student needs to find the rate of a chemical reaction for a given set of concentrations and time, given the following reaction: 2H2 (g) + O2 (g) -> 2H2O (g)If the initial concentrations of H2 and O2 are 0.5 M and 0.2 M, and the reaction rate is 0.12 M/s, what is the concentration of H2O after 10 seconds?
answered
Jan 22
in
Chemical reactions
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