Suppose a student is measuring the optical rotation of a 1 M sample of (S)-(-)-
Limonene. The path length is 13cm. What optical rotation should the student expect to
measure?
Use textbook. UCI does not tolerate activities such as this.
tony is stupid
I agree with anon, tony is stupid
I totally agree with anon and rocky...Tony is STUPID
how do you do this problem?!
lawls
To determine the optical rotation, we need to consider the specific rotation of (S)-(-)-Limonene and the concentration of the solution. The specific rotation is a property of a compound, which indicates the degree to which it rotates polarized light.
First, let's find the specific rotation of (S)-(-)-Limonene. The specific rotation is typically given in literature or can be found in databases or textbooks. For (S)-(-)-Limonene, the specific rotation is approximately -127.0 degrees.
Next, calculate the expected optical rotation using the specific rotation and the concentration. The formula to calculate the observed rotation is:
Observed Rotation = Specific Rotation × Concentration × Path Length
In this case, the concentration is given as 1 M (1 mole per liter), and the path length is 13 cm.
Substituting the values into the formula:
Observed Rotation = (-127.0 degrees) × (1 M) × (13 cm)
Now, multiply the specific rotation by the concentration and the path length to get the expected optical rotation:
Observed Rotation = -127.0 degrees × 1 × 13 cm
Simplifying the calculation:
Observed Rotation = -1651.0 degrees cm
Therefore, the student should expect to measure an optical rotation of -1651.0 degrees cm for the 1 M sample of (S)-(-)-Limonene with a path length of 13 cm.