A drug has an equilibrium solubility in water of 0.0025 g cm^-3. The diffusivity of the...
A drug has an equilibrium solubility in water of 0.0025 g cm^-3. The diffusivity of the drug in water is 0.9 x 10^-5 cm2/sec. The drug is made into particles that have a radius of 0.1 cm and these particles have a density of 1.27 g/cm^3. These particles are all of the same size and are gently mixed in water in a stirred vessel. Estimate the length of time in hours (hrs) that it will take for these drug particles to completely dissolve. You can assume that the vessel volume is so large that the concentration of the drug in the bulk liquid is very small in comparison to the drug solubility. Also since the particles are all the same size, the time to dissolve is the same for all the particles.
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A drug has an equilibrium solubility in water of 0.0025 g cm^-3.
The diffusivity of the...
Pre-Lab Assignment 1) Draw the reaction mechanism for the reaction. 2) Determine the limiting reagent. Procedure...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt at zero degrees while you are preparing the sodium 2-naphthoxide solution? 2. (2 Points) Would you need to use sodium carbonate for the diazotization of meta- nitroaniline? Explain your answer. 3. (2 Points) What would be the IUPAC name for the azo dye if you would have used p-chloroaniline instead of sulfanilic acid? Experiment 12 4. (4 Points) Calculate the theoretical yield for Orange...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt at zero degrees while you are preparing the sodium 2-naphthoxide solution? 2. (2 Points) Would you need to use sodium carbonate for the diazotization of meta- nitroaniline? Explain your answer. 3. (2 Points) What would be the IUPAC name for the azo dye if you would have used p-chloroaniline instead of sulfanilic acid? Experiment 12 4. (4 Points) Calculate the theoretical yield for Orange...
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