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Lab2_Extraction.pdf - Microsoft Edge online.ksu.edu/COMS/player/content/_16794/content/Modules/Lab2-Extraction.pdf Liquid-Liquid Extraction, Prelab Questions Thought Experiments based on the concept .The solubility in water of compound A is 10g/100mL. The solubility in diethyl ether of compound A is 1g/100mL What is the partition coefficient (K ether/water) for compound A? The solubility in water for compound B is 1g/100mL. The solubility in ether for compound B is 5g/100mL. What is the partition coefficient (K, ether/water) for compound B? partition coefficient (Kp ether/water) for compound B? A mixture containing 0.50g compound A and 1.0g compound B solubility properties described above) is dissolved in 50 mL diethyl ether. The diethyl ether solution is shaken with 100 mL water and the liquid mixture is allowed to settle into two layers How much of each compound is found in the diethyl ether layer and how much of each compound is found in the water layer? Liquid-Liquid Extraction, Prelab Questions t O Ask me anything 11:41 AM 12/21/2015Explanation / Answer
Solubility of A in water = 10 g / 100 mL
Solubility of A in diethyl ether = 1 g / 100 mL
Partition coefficient of A = Solubility in ether / Solubility in water
= 1 / 10 = 0.1
Let x g of compound A is found in diethyl ether layer.
0.1 = (x / 50) / ((0.50 - x) / 100)
Solving this we get,
x = 0.023 g
So, 0.023 g compound A is found in diethyl ether layer.
and 0.477 g compound A is found in water layer.
Solubility of B in water = 1 g / 100 mL
Solubility of B in diethyl ether = 5 g / 100 mL
Partition coefficient of A = Solubility in ether / Solubility in water
= 5 / 1 = 5
Let x g of compound A is found in diethyl ether layer.
5 = (x / 50) / ((1.0 - x) / 100)
Solving this we get,
x = 0.71 g
So, 0.71 g compound A is found in diethyl ether layer.
and 0.29 g compound A is found in water layer.
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