Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter25: Enolate & Enol Nucleophiles
Section: Chapter Questions
Problem 20E
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Question
17) After the reaction, Gwen sees a solid appear. She should collect this solid by
rotary evaporator
vacuum filtration
TLC
gravity filtration
18) After completing the separation and purification, Gwen checks the purity of her isolated mandelic acid on a polarimeter. She takes 0.525 g of solid and dissolves it in 5 mL of acetone. She puts this in a tube with a pathlength of 1 dm. The polarimeter gives a reading of +13.0011 deg.
The reported optical activity of mandelic acid is [a]lit = 151 deg
What is the EE for this sample?
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