How could we verify that two different samples, with the same melting points, are the same compound? Mix melting method. If the two samples are different compounds that happen to have the same melting point, a half and half mixture of the two samples will have a lower and wider melting point range than either sample by itself. If the two samples are the same compound, a half and half mixture of the two samples will have the same melting point as either sample by itself. All of these

How could we verify that two different samples, with the same melting points, are the same compound? Mix melting method. If the two samples are different compounds that happen to have the same melting point, a half and half mixture of the two samples will have a lower and wider melting point range than either sample by itself. If the two samples are the same compound, a half and half mixture of the two samples will have the same melting point as either sample by itself. All of these

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter5: Distillation

Section: Chapter Questions

Problem 9Q

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Similar questions

What will be the composition of the vapor when a mixture containing 0.30 of A was subjected to fractional distillation with two theoretical plates? a 0.72 A; 0.28 B b 0.87 A; 0.13 B c 0.50 A; 0.50 B d 0.30 A; 0.70 B
Below are the gas chromatography results of two separate distillations of the same 1:1 mixture of ethanol and 1-butanol. One sample was obtained from the first fraction of a simple distillation and one sample was obtained from the first fraction of a fractional distillation. Identify the peaks in the chromatographs. Discuss the conclusions you can make regarding simple distillation compared with fractional distillation. Which method was more successful?
You were analyzing a mixture of volatile solvents using Gas Chromatography and found out that two peaks are unresolved (not well-separated) using your initial program. Which method can you use to obtain a chromatogram with well separated peaks?
The liquid-liquid extraction is the classical technique in chemistry to isolate a target component from a mixture. Organic Solvent is the usual solvent being used along with water. TRUE or FALSE
The best liquid mixtures for separation by simple distillation need to have boiling points that differ by at least ___________ oC. 10 20 30 40
Remember how you learned that a pure liquid distills within a narrow boiling point range, but that a narrow boiling point range doesn’t necessarily imply a pure liquid? Keeping that lesson in mind, explain this: you know without a doubt from a spectroscopic technique that your product mixture contains 2 distinct products. .. yet your tlc plate shows only one spot. How can this be possible?
The melting point (mp) range of reference compound A is 320-340°C. The mp range of a 1:1 mixture of a sample of A with a sample of unknown compound B is found to be 140-300°C. Do the samples consist of identical compounds? A)Yes, because the mp of the mixture is lower than the mp of pure A. B) Not enough information is given to answer the question C) Yes, because they melt over a broad range. D) No, because the mp of the mixture is lower than the melting point of pure A.
You and your partner independently measure the melting point of the same pure sample .you observe q melting point of 126.5-129 c while your pwrthber observes a melting point of 126-132 how can two different results be obtained? Provide at least three possible explanation
A binary mixture of benzene and toluene containing 57.47 mol% benzene is continuously distilled. The distillate contains 90.40 mol% benzene, while the bottom product contains 86.96 mol% toluene. What molar flow rate of the bottom product will correspond to 183.11 mol/h of the distillate product? Type your answer in mol/h, 2 decimal places.
What effect does the presence of impurity have on the melting point? Can the amount of impurity be quantified by melting point determination?
When 1.06 mmol of 1-pentanol and 1.53 mmol of 1-hexanol were separated by gas chromatography, they gaverelative peak areas of 922 and 1 570 units, respectively. When 0.57 mmol of pentanol was added to an unknowncontaining hexanol, the relative chromatographic peak areas were 843:816 (pentanol:hexanol). How muchhexanol did the unknown contain?
Make a results and discussion in Laboratory Report Format of the following: 1. Separation of mixture using different techniques 1.1 Simple distillation: Water + acetone 1.2 Fractional Distillation: Methanol + ethanol 1.3 Chromatography: Separation of mixture of Red ink and blue ink 2. purification of impure samples by crystallization 2.1 Copper sulfate 2.2 Potash alum 2.3 Benzoic acid