Dina Karina Laboratory performed: 1/22/15 Chem 2203-012 Report credited: 1/29/15
TA: Kavitha Akula
Experiment 4A: Determination of any Partition Pourcentage for Benzoic Acid in Methylene Chloride and Drinking water, and Experiment 4B: Solvent Extraction I actually: Acid-Base Extraction Using the System Benzoic Acid solution, Methylene Chloride, and Sodium Bicarbonate Answer
The goal of this experiment is to get familiar oneself with the general techniques determining a partition agent at the microscale level and pay attention to in evaluating milligram amounts of materials on an electronic digital balance, the usage of automatic pipets, the use of copy pipet, plus the use of a vortex appliance. Also, to familiarize one self with removal technique in which a reversible reaction is employed to vary the solubility characteristics of the substance of interest.
Experiments 4A and 4B were followed as referred to in Mayo, pages 144-147, with the modifications listed in the Blackboard document. Additional modifications to the method included the following: The amount of benzoic acid was 76 mg for experiment 4A and 74 magnesium for research 4B instead of 75 mg for equally experiments.
Info and Benefits
Data and Results Table
Benzoid acid Primary
10% NaHCO3 solution (mL)
Benzoid Acid in CH2Cl2 (mg)
Benzoic acid in remaining aqueous (mg)
Benzoid chemical p
KpCH2Cl2/aq. NaHCO3 *
1 ) 0
1 ) 0
2 . almost 8
1 . zero
1 ) 0
*Note that intended for Experiment 4B, this calculations does not offer a true zone coefficient because benzoic chemical p is chemically modified in the procedure. The worthiness is still useful for illustrating the distribution of benzoic acid solution and its derivatives between the two phases.
After dissolving benzoic acidity in 1 . 0mL CH2Cl2 and 1 ) 0mL WATER, two levels are created, the best layer is usually H2O and...
Cited: 1 ) Mayo, Deb. W.; Pike, R. M.; Forbes, D. C. Microscale Organic Laboratory with Multistep and Multiscale Syntheses, sixth ed.; Steve Wiley & Sons, Incorporation., 2011; pp 141-147.
2 . Modifications pertaining to Expts 4A and 4B: Partition Agent Determination and Solvent Removal I, Blackboard document.
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