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the partition coef of ethanoic acid between water and 2-methylpropan-1-ol
Member rating: No Rating | Words: 875 | Submitted: Wed Jan 23 2008
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Determination of the distribution coef. of ethanoic acid between water and 2-methylpropan-1-ol Aim To determine the distribution (partition) coefficient for the equilibrium that exists when ethanoic acid is distributed between water and 2-methylpropan-1-ol. Principle By shaking ethanoic acid solution with 2-methylpropan-1-ol, the concentration of ethanoic acid in each solvent is determined by titration. The partition coefficient, Kd, can be obtained due to different solubility of solute in 2 solvents. Apparatus titration apparatus, separating funnel, 10ml pipettes, beakers, measuring cylinders Procedure 1. 15cm3 of the given aqueous ethanoic acid and 25cm3 of 2-methylpropan-1-ol were poured into a 100cm3 separating funnel, using suitable apparatus. The funnel was stoppered and was shook vigorously for 1 to 2 minutes. (The pressure in the funnel was released by occasionally opening the tap.) 2. 10cm3 of each layer was separated approximately. (The fraction near the junction of the two layers was discarded.) 3. 10.0cm3 of the aqueous layer was pipetted into a conical flask...
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