(b) A researcher wishes to obtain a glycoside (an organic compound) from an aqueous plant extract using the solvent extraction technique. She therefore performs the following steps: Step 1: An aqueous solution (100 mL) containing 7 g of the glycoside was shaken with 50 mL of ethyl acetate. Step 2: The resulting aqueous layer from Step 1 was further shaken with 50 mL of dichloromethane. Given that: Kp for the glycoside in ethyl acetate-water = 0.8 Kp for the glycoside in dichloromethane-water = 0.9 (i) Calculate the total mass of glycoside extracted. (ii) If the molar mass of the glycoside = 784.3 g/mol, calculate the molar concentration of the %3D glycoside remaining in the aqueous layer after each extraction.
(b) A researcher wishes to obtain a glycoside (an organic compound) from an aqueous plant extract using the solvent extraction technique. She therefore performs the following steps: Step 1: An aqueous solution (100 mL) containing 7 g of the glycoside was shaken with 50 mL of ethyl acetate. Step 2: The resulting aqueous layer from Step 1 was further shaken with 50 mL of dichloromethane. Given that: Kp for the glycoside in ethyl acetate-water = 0.8 Kp for the glycoside in dichloromethane-water = 0.9 (i) Calculate the total mass of glycoside extracted. (ii) If the molar mass of the glycoside = 784.3 g/mol, calculate the molar concentration of the %3D glycoside remaining in the aqueous layer after each extraction.
Macroscale and Microscale Organic Experiments
7th Edition
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Kenneth L. Williamson, Katherine M. Masters
Chapter7: Extraction
Section: Chapter Questions
Problem 1Q
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Question
![(b)
A researcher wishes to obtain a glycoside (an organic compound) from an aqueous plant extract
using the solvent extraction technique. She therefore performs the following steps:
Step 1: An aqueous solution (100 mL) containing 7 g of the glycoside was shaken with 50 mL of
ethyl acetate.
Step 2: The resulting aqueous layer from Step 1 was further shaken with 50 mL of
dichloromethane.
Given that:
Kp for the glycoside in ethyl acetate-water = 0.8
Kp for the glycoside in dichloromethane-water = 0.9
(i) Calculate the total mass of glycoside extracted.
(ii) If the molar mass of the glycoside = 784.3 g/mol, calculate the molar concentration of the
glycoside remaining in the aqueous layer after each extraction.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F034dc12f-b385-4ddc-908b-a4d6154315b7%2F8cedf78a-9b33-4b78-902e-77a35e21d3c6%2Fw45ey7d_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(b)
A researcher wishes to obtain a glycoside (an organic compound) from an aqueous plant extract
using the solvent extraction technique. She therefore performs the following steps:
Step 1: An aqueous solution (100 mL) containing 7 g of the glycoside was shaken with 50 mL of
ethyl acetate.
Step 2: The resulting aqueous layer from Step 1 was further shaken with 50 mL of
dichloromethane.
Given that:
Kp for the glycoside in ethyl acetate-water = 0.8
Kp for the glycoside in dichloromethane-water = 0.9
(i) Calculate the total mass of glycoside extracted.
(ii) If the molar mass of the glycoside = 784.3 g/mol, calculate the molar concentration of the
glycoside remaining in the aqueous layer after each extraction.
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