3. (+)-Tartaric acid has a specific rotation of +12.0°. Calculate the specific rotation of a mixture of 68% (+)-tartaric acid and 32% (-)-tartaric acid.
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- 4. (+)-Tartaric acid has a specific rotation of +12.0°. Calculate the specific rotation of a mixture of 68% (+)-tartaric acid and 32% (-)-tartaric acid. CThe pure D-form of a compound has a specific rotation (D line of sodium, 20° C) of +24°, whereas the pure L- form of the compound has a specific rotation (D line of sodium, 20° C) of -24°. If a scientist has a sample of this compound that is known to be 78% pure D-form (and, therefore, 100% - 78% pure L-form), what will be the observed rotation of this sample? Enter your answer to the nearest hundredth. The units are assumed to be degrees. 13.44a) Draw the structure of the compound: (R) -1,1,2-trimethylcyclohexane. b) (+)-Oxalic acid has a specific rotation of +14.0°. Calculate the specific rotation of a mixture of 58% (+)-Oxalic acid and 42% (-)-Oxalic acid.
- 4. Borneol is a chiral organic compound that acts as a natural insect repellent. A levorotatory mixture consisting of 68 % (--borneol and 32 % (+)-borneol has (aļo"- 13. What is the specific rotation, (alo" of (+)-borneol? Please show your work below.(+) Chloramphenicol is a powerful antibiotic isolated in 1949 from the Streptomyces venezuelae bacterium. Its specific rotation is +18.6°. What is the composition of a mixture of (+) and (-) chloramphenicol whose observed specific rotation is +14.88° ? Select one: A. 60% (+) chloramphenicol and 40 % (-) chloramphenicol B. 70% (+) chloramphenicol and 30 % (-) chloramphenicol C. 90% (+) chloramphenicol and 10 % (-) chloramphenicol D. 80% (+) chloramphenicol and 20 % (-) chloramphenicolA sample mixture containing the made-up enantiomers (R)-(+)-Nenamide and (S)-(-)-Nenamide has an apparent specific rotation of +6.50° at 25 °C. This sample has an enantiomeric excess (EE) of 43.0%. Provide answers to the following questions : 1.Which enantiomer is in excess in the sample? 2.What is the specific rotation of (S)-(-)-Nenamide?
- CH-ST53 The specific rotation of dextrorotatory tartaric acid is +12.7 degrees. A mixture of dextrorotatory and levorotatory tartaric acid has a specific rotation of -6.35 degrees. What is the proportion of each compound in the mixture? O A. 25% of the dextrorotatory tartaric acid and 75% of the levorotatory tartaric acid O B. 33% of the dextrorotatory tartaric acid and 67% of the levorotatory tartaric acid OC. 50% of the dextrorotatory tartaric acid and 50% of the levorotatory tartaric acid O D.75% of the dextrorotatory tartaric acid and 25% of the levorotatory tartaric acidGlutamic acid is a naturally occurring amino acid and isthe precursor to the food additive MSG (monosodium glutamate)which can cause allergic reactions in some people. If naturally occurring L glutamic acid has a melting point of 205 C and an optical rotation of + 31.5, what is the melting point and optical rotation of its enantiomer?An attempt at synthesizing a certain optically-active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of +16.0°. If it is known that the specific rotation of the R enantiomer is -33.3°, determine the percentage of each isomer in the mixture. R enantiomer: S enantiomer: % %
- Glutamic acid is a naturally occurring amino acid and is the precursor to the food additive MSG (monosodium glutamate) which can cause allergic reactions in some people. If naturally occurring L glutamic acid has a melting point of 205 C and an optical rotation of + 31.5, what is the melting point and optical rotation of its enantiomer?(- )- Mandelic acid has a specific rotation of - 158°. What would be the specific rotation of a solution which contains 50% (- )- mandelic acid and 50% (+ )- mandelic acid? А. 0° В. + 79° O C. The value must be experimentally determined D. - 79°The absolute value of the specific rotation of an enantiomer 2-butanol is 13.5o. What is the percentage of each enantiomer (R and S) in a mixture that has a specific rotation of -8.5o? The (R)-enantiomer is levorotatory. Be clear and detailed.