Kd - Distribution Coefficient

Kd – Distribution Coefficient

Name: Stephanie Leath Date of Experiment: 10-7-2008, 10-14-08 TA’s Name: Gayan Senavirathne Lab Section: 012 Lab Partner’s Name: Eno Latifi

Single Extraction was performed by: Stephanie Leath Fill in the blanks from data of the single extraction. 1. Grams of benzoic acid in 70.0 mL of 0.020 M solution of benzoic acid in water: 0.070L x 0.020mol x 122.12g = 0.171g 1L 1mol 2. Mass of dry 125-mL Erlenmeyer flask: 122.758g 3. Mass of Erlenmeyer flask and benzoic acid after extraction and evaporation of the organic solvent: 122.895g 4. Grams of benzoic acid extracted into the organic layer (3 minus 2): 122.895 g - 122.758g = 0.137g 5. Grams of benzoic acid remaining in the aqueous layer (1 minus 4): 0.171g – 0.137g = 0.034g

0.137g 0.030L 4.57g/L Kd = = = 9.40 0.034g 0.486 g/L 0.070L Multiple Extraction was performed by: Eno Latifi Fill in the blanks from data of the multiple extraction. 6. Grams of benzoic acid in 70.0 mL of 0.020 M solution of benzoic acid in water: 0.070L x 0.020mol x 122.12g = 0.171g 1L 1mol 7. Mass of dry 125-mL Erlenmeyer flask: 124.305g 8. Mass of Erlenmeyer flask and benzoic