EXPERIMENT 6 - Extraction

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CHEM 2423 Extraction of Benzoic AcidLaboratory –EXP 6Data and Results (Extraction of Benzoic Acid)Date:____________Name:Lab Report: _______Dr. PahlavanPart 1: Standardization of NaOH Solutiona. Volume of base required to neutralize 10.0 ml of the benzoic acid solution:Trial 1: _____ml Trial 2: _____ml Average: _____ mlb. Molarity of the NaOH solution:(ml of base) (M of base) = (ml of acid) (M of acid)Calculation:__________MPart 2:Distribution Coefficenta. Volume of base required to neutralize 50 ml of benzoic acid solution after a singleextraction with 10.0 ml 0f CH 2 Cl 2__________ mlb. Moles of benzoic acid neutralized: (2a in L) (1b) __________ moleCalculation:c. Grams of benzoic acid neutralized: (2b) (MW of benzoic acid) __________ gCalculation:d. Grams of benzoic acid originally present in 50 ml before extracting with CH 2 Cl 2 : 0.122 g0.61 g/250 ml = x/50 ml, x = 0.122 ge. Grams of benzoic acid extracted in CH 2 Cl 2 : (2d – 2c) __________ gCalculation:f. Percent of benzoic acid in extracted in CH 2 Cl 2 : (2e/2d) x 100 __________ %Calculation:g. Distribution coefficient K d = C C H2 Cl2 /C H2O : (2e/10 ml)/ (2c/50ml) __________Calculation:8
CHEM 2423 Extraction of Benzoic AcidDr. PahlavanPart 3:Multiple Extrationa. Volume of base required to neutralize 50 ml of benzoic acid solution aftertwo extraction with 5.0 ml of CH 2 Cl 2 each:__________ mlb. Moles of benzoic acid neutralized: (3a in L) (1b) __________moleCalculation:c. Grams of benzoic acid neutralized: (3b) (MW of benzoic acid) __________ gCalculation:d. Grams of benzoic acid originally present in 50 ml before extracting with CH 2 Cl 2 0.122 gCalculation:e. Grams of benzoic acid extracted in CH 2 Cl 2 : (3d – 3c) __________ gCalculation:f. Percent of benzoic acid in extracted in CH 2 Cl 2 : (3e/3d) x 100 __________%Calculation:Calculate amount of benzoic acid which would be extracted in two 5.0 ml extractions with CH 2 Cl 2 based onyour K d obtained in part 2:Show calculation:9
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EXPERIMENT 6 - Extraction

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