Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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An unknown compound is suspected to be acetanilide (mp 113.5-114). What would happen to the melting point if this unknown were mixed with an equal quantity of pure acetanilide?
The melting point would remain close to the authentic sample melting point.
none of these answers are correct.
the mix sample would show a melting point elevation.
the mix sample would show a melting point depression.
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- 1a. Use the given table to construct a temperature-composition diagram for cyclohexane Toluene mixture. Based on the plot, what is the composition of the distillate obtained by Simple distillation 20 mole percent cyclohexene and 80 mole percent toluene? Show your Work on the plot. 1b. Estimate the composition of the distillate of 20 mole percent of cyclohexane if the Distillation column had three theoretical plates.arrow_forward"Consider a crystallization of sulfanilamide in which 10 mL of hot 95% ethyl alcohol is added to 0.10 g of impure sulfanilamide. After the solid has dissolved, the solu-tion is cooled to room temperature and then placed in an ice-water bath. No crys-tals form, even after scratching with a glass rod. Explain why this crystallization failed. What would you have to do at this point to make the crystallization work? You should assume that starting over again with a new sample is not an option. (You may need to refer to Technique 11, Figure 11.2.)2.Benzyl alcohol (bp 205°C) was selected by a stu"arrow_forwardIf 80% of a desired compound is extracted into the organic phase in each step (leaving 20% in the aqueous layer), how many extractions are necessary to ensure that at least 99% of the compound has been recovered in the organic phase? 1 extraction 2 extractions 3 extractions 4 extractionsarrow_forward
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