Microsoft Word - PC Part B and Solv Extract I Report_FA15.docxMicrosoft Word - PC Part B and Solv Extract I Report_FA15.docxMicrosoft Word - PC Part B and Solv Extract I Report_FA15.docx
1-Laboratory glassware comparison for solvent extraction: concial vial vs separatory funnel...
a) Which piece of laboratory glassware did you find to be more efficient for the solvent extraction procedure, and why?
b) Assuming ideal separatory funnel performance (complete phase separation and no loss of solvent into the stem during venting), which piece of laboratory glassware provides a more accurate determination of the partition coefficient, and why?
2-Draw the chemical structure of benzoic acid and use it to answer the following solubility- based questions:
a) Circle and label the region of the molecule that exhibits non-polar behavior.
b) These non-polar regions interact with solvent molecules with what types of intermolecular forces (list all that apply): hydrogen bonding, dipole-dipole, dipole-induced dipole, or induced dipole-induced dipole (London dispersion)?
c) Circle and label the region of the molecule that exhibits polar behavior.
d) This polar region interact with solvent molecules with what types of intermolecular forces (list all that apply): hydrogen bonding, dipole-dipole, dipole-induced dipole, or induced dipole-induced dipole (London dispersion)?
e) Based on the answers to parts (a)-(d) and Question 1 from the Partition Coefficient Part A lab report, predict whether benzoic acid will be more or less soluble in water than 9- fluorenone. Explain your answer.
3- In Experiment 4B, a chemical reaction occurred to form sodium benzoate. This chemical reaction should be included in the Reaction Scheme section (hint: review common types of chemical reactions in aqueous solutions from general chemistry).
- a) Sodium benzoate is formed from benzoic acid by what common type of chemical reaction that occurs in aqueous solutions?
- b) What is the role of sodium bicarbonate in this reaction?
- c) Draw the chemical structure of sodium benzoate and include all charges
- d) Circle and label the region of the molecule that exhibits polar behavior
- e) What is the strongest intermolecular force with which sodium benzoate will interact with the solvent water?