Separation techniques benzoic acid
Allow the filter to drain.
Rodig, C. Place a piece of filter paper in the funnel, and dampen it slightly so it adheres to the funnel. Even though the concentration is low, the solution removed from the solid benzoic acid crystals still is saturated with benzoic acid.
Sand has a density in the range of 2. Once extracted, the carboxylic acid and phenol can both be recovered by adding HCl to the aqueous solutions.
Saunders Company. If a solid precipitates, add a boiling stone and then gently heat the solution to bring most of the solid back into solution. Be sure you are familiar with the procedure below before starting the lab.
Extraction of benzoic acid lab report
Later you will isolate any compound that was extracted by the bicarbonate. Transfer the dried sand to a tube and stopper. Following this, after another vacuum filtration, the creamy colored HBz solid remained in the filter paper. Now, we will follow the same procedure to isolate the phenol from the Erlenmeyer flask labeled "hydroxide". In this experiment the steam bath was used to heat the low boiling point liquid of crude benzoic acid and 50ml of diethyl ether. The reaction of a phenol, however, favors the reactants since the pKa of phenol 10 is larger than that of the carbonic acid 6. Make sure you label everything so that you can identify which layer you are putting into each flask correctly - label one mL Erlenmeyer flask "bicarbonate", a second one as "hydroxide", and a 50 mL Erlenmeyer flask "ethyl acetate". This can be recovered by heating the solution to evaporate water. You will also weigh each solid you obtain to determine the percent recovery of your procedure. Saunders Company. Remove the benzoic acid from the filter cone to the folder paper towel, and set aside to dry.
Explain how this would have affected the separation procedure.
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