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Topic: opitcal rotations  (Read 3285 times)

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jena

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opitcal rotations
« on: March 05, 2005, 10:51:18 PM »
Hi,

I have two questions the first one is:

Give a mixture of enantiomers with observed rotation of -38 degrees and specific rotation of 50, what percentage (+) enantiomers does the mixture have?

My answer: 88,

I got this answer by this equation:
 (38/50+1)/2

My other question is:

What is the optical rotation value of pure (+) enantiomers if a 1:3 mixture of (+) enantiomers rotates light -25?

My answer: 75


Are any of these answers correct? If not please explain to me what I may have did wrong.

Thank you  :)
« Last Edit: March 06, 2005, 11:55:13 PM by jena »

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