For TLC analysis, a student calculates the following Rf values for her samples: 0.69=aspirin; 0.80=Ibuprofen; 0.74=acetaminophen; 0.87=naproxen; 0.95=caffeine. 0.72=over-the-counter drug (unknown). What is the probable identity of the unknown? Explain.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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For TLC analysis, a student calculates the following Rf values for her samples:

0.69=aspirin; 0.80=Ibuprofen; 0.74=acetaminophen; 0.87=naproxen; 0.95=caffeine.

0.72=over-the-counter drug (unknown). What is the probable identity of the unknown? Explain.

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