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How does pH affect the stability of colloidal particles and their tendency to coagulate?
asked
5 days
ago
in
Surface Chemistry
0
votes
1
answer
44
views
What are the major air pollutants that can harm human health, and how can their concentration be measured and minimized in urban areas?
asked
Feb 13
in
Environmental Chemistry
0
votes
1
answer
24
views
How does increasing the surface area of a reactant affect the rate of a chemical reaction?
asked
Feb 13
in
Chemical kinetics
0
votes
1
answer
37
views
How can technology be effectively integrated into the teaching of complex chemical concepts, such as organic chemistry reactions and mechanisms, to maximize students' understanding and engagement?
asked
Feb 6
in
Chemical education
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votes
1
answer
31
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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?
asked
Feb 5
in
Chemical education
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1
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28
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How can computational chemistry and molecular modeling be used to simulate the behavior of chemical compounds in different environments, and how can these simulations be validated experimentally?
asked
Feb 5
in
Physical Chemistry
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1
answer
56
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Design a distillation column that can effectively separate a mixture containing 50 wt% methanol and 50 wt% water. The column should produce a distillate with no more than 5 wt% methanol and a bottom product with no more than 2 wt% water. The feed rate is 1000 kg/h and the column must operate at atmospheric pressure. Assume that the feed is a saturated liquid and that the methanol-water mixture behaves as an ideal solution. Provide the design specifications for the column, including the number of trays or packing height, diameter, and other necessary specifications.
asked
Feb 3
in
Chemical engineering
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votes
1
answer
48
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Calculate the standard enthalpy change for the following neutralization reaction where hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to form sodium chloride (NaCl) and water (H2O).HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)Given the following tabulated standard enthalpies of formation values: ΔHf°(HCl) = -167 kJ/mol, ΔHf°(NaOH) = -469 kJ/mol, ΔHf°(NaCl) = -411 kJ/mol, ΔHf°(H2O) = -286 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
56
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Calculate the standard cell potential (E°) for the following electrochemical cell:Zn(s) | Zn2+(aq, 0.100M) || Cr3+(aq, 0.050M) | Cr(s)Given: E°cell (Zn2+/Zn) = -0.76 VE°cell (Cr3+/Cr) = -0.74 V
asked
Feb 3
in
Physical Chemistry
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1
answer
45
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A student wants to determine the polarization in an electrochemical cell where the anode is made of zinc and the cathode is made of copper. The electrolyte used is CuSO4. The current through the cell is 0.5 A and the measured potential difference is 1.5 V. What is the polarization of this electrochemical cell?
asked
Jan 22
in
ElectroChemistry
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1
answer
77
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What is the major product obtained from the Friedel-Crafts acylation reaction of toluene with acetyl chloride in the presence of aluminum chloride as a catalyst?
asked
Jan 21
in
Organic Chemistry
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1
answer
34
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Where did Fritz Perls develop the Gestalt therapy approach?
asked
Jan 17
in
Psychology
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1
answer
31
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Why is the biosocial theory used in forensic psychology?
asked
Jan 16
in
Psychology
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votes
1
answer
46
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When is the self-esteem higher in times of stress?
asked
Jan 15
in
Psychology
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votes
1
answer
14
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How does the theory of sexual conflict relate to human mating behaviours?
asked
Jan 15
in
Psychology
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1
answer
52
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What is implicit memory?
asked
Jan 15
in
Psychology
0
votes
1
answer
49
views
How does indigenous psychology differ from Western psychology?
asked
Jan 14
in
Psychology
0
votes
1
answer
51
views
Compare and contrast achievement motivation and affiliation motivation.
asked
Jan 14
in
Psychology
0
votes
1
answer
42
views
Who developed the concept of 'existential vacuum'?
asked
Jan 10
in
Psychology
0
votes
1
answer
27
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Why is gingko biloba planted in public spaces?
asked
Jan 8
in
Science
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