Questions by ArleneLeichh

0 votes

1 answer 33 views

What is the mechanism for the preparation of 2,4-dichloronitrobenzene from nitrobenzene and chlorine gas, and what are the optimum conditions (temperature, pressure, and concentration) necessary for the reaction to take place efficiently?

asked Feb 22 in Chemical synthesis

0 votes

1 answer 34 views

What is the optimized temperature and reaction conditions for the synthesis of polystyrene from styrene monomers using free radical polymerization?

asked Feb 22 in Chemical synthesis

0 votes

1 answer 36 views

What is the most efficient protecting group strategy for selectively protecting the primary alcohol in a mixture of primary and secondary alcohols during a synthesis reaction?

asked Feb 21 in Organic Chemistry

0 votes

1 answer 36 views

What is the most efficient and cost-effective method for producing a specific fragrance compound in large quantities using chemical engineering principles?

asked Feb 21 in Chemical engineering

0 votes

1 answer 44 views

How does the structure of hemoglobin influence its function as an oxygen transporter in the human body?

asked Feb 13 in Organic Chemistry

0 votes

1 answer 38 views

How can the polymerization reaction of styrene monomer be manipulated to achieve different molecular weights and properties in the resulting polystyrene polymer?

asked Feb 10 in Chemical synthesis

0 votes

1 answer 34 views

How can chemistry students effectively supplement limited opportunities for hands-on experimentation in order to enhance their understanding of chemical concepts and processes?

asked Feb 4 in Chemical education

0 votes

1 answer 70 views

Consider a solution of gas X in contact with a solid surface at a constant temperature. The Langmuir adsorption isotherm for this system is represented by the equation /= _/(1+), where is the partial pressure of gas X, is the volume of the gas, _ is the saturation pressure of the gas, and is the Langmuir adsorption constant. Suppose a student conducts an experiment to investigate the Langmuir adsorption isotherm for gas X on a particular solid surface. They measure the partial pressure of the gas at various volumes and obtain the following results: (mL/g) : 2.0 2.5 3.0 3.5 4.0 (atm) : 0.2 0.4 0.6 0.8 1.0 Using these values, what is the Langmuir adsorption constant, , for the given system?

asked Feb 3 in Surface Chemistry

0 votes

1 answer 100 views

Calculate the standard enthalpy change for the following reaction involving liquids at 298 K: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)Given the standard enthalpies of formation of C2H5OH(l), CO2(g) and H2O(l) are −277.6 kJ/mol, −393.5 kJ/mol and −285.8 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics

0 votes

1 answer 85 views

How does changing the pH of a redox reaction affect the equilibrium position and what factors determine whether the reactants or products are favored? Provide an example of a redox reaction and calculate the equilibrium constant under different pH conditions to illustrate the concept.

asked Feb 3 in Chemical equilibrium

0 votes

1 answer 99 views

What is the coordination environment of the metal center in the active site of the enzyme carbonic anhydrase (CA)? How does the coordination environment affect the enzyme's catalytic activity? Support your answer with relevant examples and experimental evidence from the literature.

asked Jan 31 in Coordination Chemistry

0 votes

1 answer 59 views

Calculate the change in enthalpy and entropy for the reaction Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) at 25°C given the following data:- ΔH°f for MgCl2(aq) = -641.3 kJ/mol- ΔS°f for MgCl2(aq) = -200.9 J/K/mol- ΔH°f for H2(g) = 0 kJ/mol- ΔS°f for H2(g) = 130.7 J/K/mol- ΔH°f for HCl(aq) = -167 kJ/mol- ΔS°f for HCl(aq) = -18.8 J/K/mol- ΔH°f for Mg(s) = 0 kJ/mol- ΔS°f for Mg(s) = 32.7 J/K/molAssume that ΔH°f and ΔS°f are independent of temperature.

asked Jan 23 in Inorganic Chemistry

0 votes

1 answer 80 views

A student wishes to prepare a buffer solution by adding 0.20 moles of acetic acid (Ka = 1.8 x 10^-5) and 0.20 moles of sodium acetate in 1 liter of solution. The student adds 0.05 moles of hydrochloric acid (HCl) to the solution. Calculate the effect of adding the buffer on the equilibrium position of the acid-base reaction and determine the new pH of the solution.

asked Jan 22 in Chemical equilibrium

0 votes

1 answer 42 views

When evaluating cognitive behavioural therapy CBT theories, what are some of the factors to consider?

asked Jan 20 in Psychology

0 votes

1 answer 111 views

Where does psychodynamic therapy originate?

asked Jan 20 in Psychology

0 votes

1 answer 87 views

What is the role of community engagement in evaluating indigenous psychology theories?

asked Jan 17 in Psychology

0 votes

1 answer 46 views

Where might a feminist psychologist look for the cause of gender-based violence?

asked Jan 17 in Psychology

0 votes

1 answer 71 views

What are the limitations of a quantitative research approach?

asked Jan 16 in Psychology

0 votes

0 answers 101 views

Who is known for advancing the Humanistic approach?

asked Jan 15 in Psychology

0 votes

1 answer 131 views

When does the just noticeable difference occur?

asked Jan 15 in Psychology

Categories