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

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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