Answered: You dilute 1g of an orgainc liquid,…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

You dilute 1g of an orgainc liquid, with ethanol, to 10mL in a volumertic flask. This solution is analyzed using polarimerty (at 20^oC), and an optical rotation of -6.8^ois observed. Calculate the specific rotation of the oraginc liquid, if the sample cell that was used was 100mm.

Expert Solution

Step 1

The formula for finding specific rotation is ,

${[α]}_{D} = \frac{α}{C \times L}$

Where ${[α]}_{D}$ is the specific rotation, $α$ is the optical rotation, $C$ and $L$ are concentration in g/mL and pathlength in dm.

Given values,

$α$ =-6.8⁰

mass of organic liquid = 1g

volume of solution =10 mL

Pathlength = 100 mm

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