Recent activity by KatherinaI21

1 answer 21 views

How does the route of administration affect the pharmacokinetics of a drug in the body? Compare and contrast the pharmacokinetics of a drug administered orally versus intravenously.

asked 2 days ago in Medicinal Chemistry

1 answer 26 views

The question for the chemistry student to solve is: How does pH affect the stability and coagulation of a colloidal solution?

asked 5 days ago in Surface Chemistry

1 answer 22 views

How does the pH of a solution affect the rate of a specific photochemical reaction?

asked 5 days ago in PhotoChemistry

1 answer 37 views

How does the concentration and exposure duration of lead, cadmium, and mercury affect the toxicity and bioaccumulation of these heavy metals in aquatic organisms such as fish and shellfish?

answered Feb 18 in Environmental Chemistry

1 answer 24 views

What is the chemical process behind the formation of acid rain, and what are the environmental effects of acid rain on aquatic life and terrestrial ecosystems?

answered Feb 18 in Environmental Chemistry

1 answer 45 views

What is the chemical equation for the combustion of methane (CH₄) in the presence of oxygen (O₂)? And what are the products formed during this combustion reaction?

asked Feb 18 in Chemical reactions

1 answer 10 views

How can the use of adsorption be optimized in designing a system for the treatment of industrial wastewater containing heavy metals?

asked Feb 14 in Chemical engineering

1 answer 54 views

What is the bond angle in a molecule of carbon dioxide (CO2)?

asked Feb 13 in Chemical bonding

1 answer 51 views

What is the role of DNA polymerase III in the replication of DNA, and how does it proofread the newly synthesized DNA strand for accuracy? Provide a detailed explanation of the mechanism involved.

answered Feb 12 in BioChemistry

1 answer 37 views

How can we design new molecules that specifically target and inhibit the COX-2 enzyme to effectively treat inflammatory diseases without causing unwanted side effects?

asked Feb 12 in Medicinal Chemistry

1 answer 35 views

How can we design a system for the production of natural vanilla flavor using chemical engineering principles and techniques?

asked Feb 12 in Chemical engineering

1 answer 27 views

How can the irreversible process of mixing two gases at different temperatures be described using non-equilibrium thermodynamics? Provide a quantitative analysis of the process assuming ideal gas behavior, and explain the consequences of irreversible mixing.

asked Feb 7 in Physical Chemistry

1 answer 51 views

Design a distillation column to separate a mixture of ethanol and water using McCabe-Thiele Method. The feed contains 50 mol% ethanol and the distillate should have a purity of at least 95 mol% ethanol. The reflux ratio is 2.5 and the boil-up ratio is 1.5. The column must have 10 theoretical plates. Determine the number of trays above the feed and below the feed and the corresponding compositions of the distillate and bottoms.

asked Feb 4 in Chemical engineering

1 answer 46 views

Calculate the standard enthalpy change for the phase transition reaction from solid to liquid for a sample of substance X, given that the mass of the sample is 10 grams and the melting point of substance X is 50°C. The specific heat capacity of substance X is 2 J/g°C and the enthalpy of fusion for substance X is 50 J/g.

answered Feb 3 in Chemical thermodynamics

1 answer 49 views

Calculate the standard electrode potential for the cell reaction: Fe3+(aq) + e- → Fe2+(aq) Given E°Fe3+/Fe2+ = 0.77 V.

answered Feb 3 in ElectroChemistry

1 answer 41 views

What is the effect of changing the concentration of one reactant on the equilibrium constant of a reaction with a known rate?

answered Feb 3 in Chemical kinetics

1 answer 70 views

How do the photochemical properties of bioluminescent organisms differ from those of non-bioluminescent organisms?

asked Jan 31 in PhotoChemistry

1 answer 57 views

How does ATP regulate the glycolysis pathway?

answered Jan 31 in BioChemistry

1 answer 62 views

What is the effect of adding a catalyst on the equilibrium position of a redox reaction between potassium permanganate and oxalic acid if the reaction has already reached equilibrium at a specific temperature and pressure? Provide a detailed explanation and show your calculations.

answered Jan 30 in Chemical equilibrium

1 answer 75 views

What is the effect of catalyst on the activation energy and rate of a chemical reaction? Provide an example of a catalytic reaction and explain how the catalyst works to increase the rate of the reaction.

answered Jan 30 in Physical Chemistry

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