HEM 226 Name SIMPLE AND FRACTIONAL DISTILLATION OF ESTERS 1. Which of the two li
ID: 542948 • Letter: H
Question
HEM 226 Name SIMPLE AND FRACTIONAL DISTILLATION OF ESTERS 1. Which of the two liquids, ethyl acetate or n-butyl acetate, do you expect to distill f 2. Consider the following situation: The liquid has just started to boil in your distillation apparatus You look at the thermometer and it reads 26 "C. Is that temperature the boiling point of the compound? Why or why not? 3. Explain why the boiling point rises during the distillation of a mixture of liquids 4. We will be using a digital thermometer in lab. Draw a picture showing where the bottom of this thermometer should be placed to correctly measure the temperature of the distilling vapors Label any distances needed to clarify. (Note: The picture in your techniques book is incorrect! Read this lab handout to find the correct answer) 5. How many vaporization-condensation cycles are there in a simple distillation? (a) zero (b) one (c) more than one How many vaporization-condensation cycles are there in a fractional distillation? (a) zero (b) one (c) more than one 6. Why is it important for a fractionating column to have a lot of surface area?Explanation / Answer
1. the boiling point of ethyl acetate = 770C and n-butyl acetate = 126.10C
ethyl acetate ditill first as it has lower boling poit than n-butyl acetae.
2. it may not be the boiling point of compound , because the simple distillation method is used to distillate the compounds which differ 250C in their boling points and simple distillation can be effective in low temperatures.
3. the temeprature will continue to increase untill the boiling point of next lowest boiling compound is approached.
5. a simple distillation requires one single cycle to get the pure compound.answer: B
a fractional distillation composed of multiple cyles , more than one cycle( ex: petroleum fractional distillation)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.