Question

In: Chemistry

1) During this distillation experiment, a student collects a 10.00 mL fraction consisting of 70% ethyl...

1) During this distillation experiment, a student collects a 10.00 mL fraction consisting of 70% ethyl acetate and 30% n-butyl acetate (by volume). What is the mole fraction of n-butyl acetate in this sample?

2) Suppose you used a shorter distilling column in this fractional distillation experiment. Would you expect to obtain a better or worse separation between the two esters explain your answer.

Solutions

Expert Solution


Related Solutions

During this distillation experiment, a student collects a 10.00 mL fraction consisting of 70% ethyl acetate...
During this distillation experiment, a student collects a 10.00 mL fraction consisting of 70% ethyl acetate and 30% n-butyl acetate (by volume). What is the mole fraction of n-butyl acetate in this sample?
An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790...
An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm3, what is the mass of 74.2 mL of ethyl alcohol?
1. In this distillation experiment we start the experiment with 10 mL of liquid mixture ofcyclohexane...
1. In this distillation experiment we start the experiment with 10 mL of liquid mixture ofcyclohexane and toluene. However, it is not possible to obtain all 10 mL back under thecurrent procedure particularly for fractional distillation. Explain why that is the case for distillation and in particular for fractional distillation. 2. How could you modify the experiment and collect all 10 mL of the startingmaterials. 3. Plot a theoretical distillation curve of temperature (y-axis) vs. volume in mL (x-axis) fora...
A student loaded a mixture onto a small flash chromatography column in 1 mL of ethyl...
A student loaded a mixture onto a small flash chromatography column in 1 mL of ethyl acetate, then proceeded to elute with hexanes/ethyl acetate 10:1. He/she found that all of the mixture came off in the first 3 fractions, with no separation. What technical mistake did the student make?
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05...
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature increase of 11.0 °C for the solution. Assuming the solution\'s final volume is 100.0 mL, the density is 1.00 g/mL, and the specific heat is 4.184 J/(g·°C), calculate the heat of the reaction, ΔHrxn.
A student plans to neutralize a 10.00 mL sample of 2.00 M HCl with sodium carbonate....
A student plans to neutralize a 10.00 mL sample of 2.00 M HCl with sodium carbonate. Consider sig. figs. for all answers. A. Balance the following equation that signifies the above reaction: Na2CO3 + HCl -> NaCl +  H2O + CO2 B. Calculate the number of moles of HCl involved in the reaction C. Calculate the number of moles of Na2CO3 required to neutralize the moles of HCl found in (b) D. Calculate the mass (in grams) of Na2CO3 required to...
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500...
Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added)? The Ka for HOCl is 3.0 x 10-8 M. What is the pH after 6.20 mL of NaOH are added? What is the pH after 9.40 mL of NaOH are added? What is the pH when half the acid has been neutralized? What is the pH after 18.90 mL of NaOH...
Guaifenesin Extraction Okay, during the extraction of Guaifenesin. We added 5-mL of ethyl acetate to the...
Guaifenesin Extraction Okay, during the extraction of Guaifenesin. We added 5-mL of ethyl acetate to the crushed Guaifenesin and I knew it was added to solubilize that Guiafenesin For the next 10 minutes if it was stirred then it was filtered. The next step confused me. We added 10 mL of hexanes to the filtrate. The question is what was the reason for addition of hexanes to the filtrate? Thanks
In an experiment a student dissolves 0.138g of a triprotic acid in 100.00 mL of water...
In an experiment a student dissolves 0.138g of a triprotic acid in 100.00 mL of water to prepare a solution for titration. A 25.00mL aliquot of the acid solution reqiures 15.49 mL of .108 M NaOH solution to reach the equivalence point. Calculate the molar mass of acid.
Discuss the IMF of caffeine used in a TLC experiment with 1:1 Hexanes / Ethyl acetate...
Discuss the IMF of caffeine used in a TLC experiment with 1:1 Hexanes / Ethyl acetate as the solvent system and explain why the polarity of caffeine is high or low in this solvent?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT