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Unformatted text preview: optical rotation study gives a result of a = +140o. Suggest a dilution experiment to test whether the result is indeed +140 o and not 220o. Ans. If the concentration of the sample solution were halved, the rotation would either be +70o or 290o if the =140 o reading is originally correct. If 220 o were correct reading, the new reading would be 110 o or +250 o. Pre-Lab Question Question 1, p 46 in "Techniques. ." 1. (R)-(+)-limonene has a boiling point of 176oC. What made it possible to steam distill it at 100oC? Ans. Because the limonene is not miscible with water, the vapor pressures of limonene and water add together. When the combined pressure equals the atmospheric pressure, distillation occurs. The distillate contains limonene and water in proportion to their vapor pressures at the boiling point 51LA W07 TA Note...
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This note was uploaded on 02/25/2010 for the course CHEM 51LB 40639 taught by Professor Link during the Spring '10 term at UC Irvine.
- Spring '10