Posted by **Jason** on Tuesday, November 18, 2008 at 12:49pm.

An optical rotation study gives a result of alpha=+140 degrees. Suggest a dilution experiment to test whether the result is indeed +140 degrees, and not -220 degrees.

-could polarimetry experiment be used to find the r and s isomer?

- chem -
**DrBob222**, Tuesday, November 18, 2008 at 2:07pm
Yes, I think it can. This problem has been posted before and I suggested diluting the sample by a factor of 10 and measuring the rotation. If the original was indeed 140 degrees, then the new measurement would show 14.0 degrees. If the original measurement was -220 degrees, the new measurement would be -22.0 degrees. There would be no confusion between +14 and -22. Check my thinking.

## Answer this Question

## Related Questions

- organic chemistry - An optical rotation study gives a result of +140 degrees. ...
- chemistry - An optical rotation study gives result of +140 degrees. Suggest a ...
- Math - Find the sum of the interior angles of a nonagon. A. 140 degrees B. 1,620...
- AP Chem - Help with these two please. 105. A radioactive metal atom decays (goes...
- Mat/116 - An experiment is underway to test the effect of extreme temperatures ...
- mat/116 - need an expression only to this word problem: An experiment is ...
- Chemistry! - Experiment on Which Fuels Provide the Most Heat? Comparison of the...
- Chem - How do I estimate the optical roation of an (S)-enantiomer if I know the ...
- Orgo chem - I have to find the boiling point of an unknown from a distillation ...
- Trigonometry - Three oil platforms, Alpha, Beta and Gamma are situated in the ...