When 0.234 g of monosodium glutamate (MSG) is dissolved in 10.0 m observed rotation at 20°(using the D line of sodium) is +0.599°. Calcu specific rotation = [a] = i
When 0.234 g of monosodium glutamate (MSG) is dissolved in 10.0 m observed rotation at 20°(using the D line of sodium) is +0.599°. Calcu specific rotation = [a] = i
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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![### Current Attempt in Progress
When 0.234 g of monosodium glutamate (MSG) is dissolved in 10.0 mL of water and placed in a sample cell 10.0 cm in length, the observed rotation at 20° (using the D line of sodium) is +0.599°. Calculate the specific rotation of MSG.
**Specific rotation** = [α] = ______
### Explanation:
To calculate the specific rotation [α] of a substance, you can use the formula:
\[ [α] = \frac{α}{l \cdot c} \]
Where:
- \( α \) is the observed rotation in degrees.
- \( l \) is the path length (length of the sample cell) in decimeters (dm). Note that 1 dm = 10 cm.
- \( c \) is the concentration of the solution in grams per milliliter (g/mL).
In this problem:
- Observed rotation (α) = +0.599°
- Path length (l) = 10 cm = 1 dm
- Mass of MSG = 0.234 g
- Volume of solution = 10.0 mL
- Concentration (c) = 0.234 g / 10.0 mL = 0.0234 g/mL
Plug these values into the formula to compute the specific rotation [α].
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Transcribed Image Text:### Current Attempt in Progress
When 0.234 g of monosodium glutamate (MSG) is dissolved in 10.0 mL of water and placed in a sample cell 10.0 cm in length, the observed rotation at 20° (using the D line of sodium) is +0.599°. Calculate the specific rotation of MSG.
**Specific rotation** = [α] = ______
### Explanation:
To calculate the specific rotation [α] of a substance, you can use the formula:
\[ [α] = \frac{α}{l \cdot c} \]
Where:
- \( α \) is the observed rotation in degrees.
- \( l \) is the path length (length of the sample cell) in decimeters (dm). Note that 1 dm = 10 cm.
- \( c \) is the concentration of the solution in grams per milliliter (g/mL).
In this problem:
- Observed rotation (α) = +0.599°
- Path length (l) = 10 cm = 1 dm
- Mass of MSG = 0.234 g
- Volume of solution = 10.0 mL
- Concentration (c) = 0.234 g / 10.0 mL = 0.0234 g/mL
Plug these values into the formula to compute the specific rotation [α].
### eTextbook and Media
[This section typically provides access to additional educational resources related to this topic.]
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