Why is it important to perform a fractional distillation slowly? What happens if a fractional distillation is done very quickly by rapidly raising the temperature of the heat source?
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Why is it important to perform a fractional distillation slowly? What happens if a fractional distillation is done very quickly by rapidly raising the temperature of the heat source?
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- In fractional distillation, liquid can be seen running from the bottom of the distillation column back into the distilling flask. What effect does this returning condensate have on the fractional distillation?How can the temperature and the vapour pressure in a fractional distillation be effectively controlledexplain why the boiling point of a two component mixture rises slowly throughout a simple distillation when the boiling-point differences are not larger
- Use a temperature-composition diagram to explain why fractional distillation of two components is more easily accomplished if the components have boiling points that differ by 20C or more.List and describe two methods that can used to improve the separation of a liquid mixture by fractional distillationWhy is flameless heating used for heating a solution in hexane or diethyl ether during a recrystallization? Why should the size of crystals obtained in a recrystallization be neither too large nor too small?
- in fractional distillation, how do you tell which liquid is in which fraction and which fraction has a mix of liquids if you are trying to seperate cyclohexane and toluene?? what would the density and boiling point of the first fraction beState whether you would want to use a fractional or simple distillation for each of the cases below. Assume the mixture contains a 1:3 mixture of two components A and B, where component A is the lower boiling point component. Briefly explain each of your answers. A) You need a really pure sample of component A.B) You just need each component to be at least 85% pure and want the MAXIMUM amount of distillate out.Compare simple and fractional distillation for the separation of HEXANE and TOLUENE
- State whether you would want to use a fractional or simple distillation for each of the cases below. Assume the mixture contains a 1:3 mixture of two components A and B, where component A is the lower boiling point component. Briefly explain each of your answers. 1. You need a really pure sample of component A. 2. You just need each component to be at least 85% pure and want the MAXIMUM amount of distillate out.During the distillation of the Bromobenzene and water mixture which fraction is richer in Bromobenzene: a) First fraction b) Second fraction c) The last fraction d) All fractions have the same compositionWhy does the temperature not change while the pure cyclohexane is freezing? This question is based on the molar mass determination by freezing point depression and cyclohexane was the solvent.
