NAME: ___________________________________________________________

I. Define the following terms:

a) Reflux ratio
 
 

b) Hold-up
 
 
 

II. Column A is 15 cm long and has an HETP of 5 cm. Column B has a length of 15 cm and an HETP of 3 cm. Which the more efficient column, A or B? Explain briefly and show your calculations.
 
 
 
 

III. List two types of column and three types of packing that can be used for fractionation.
 
 
 
 
 
 

IV. A mixture of ethyl acetate and butyl acetate has a refractive index of 1.3811. What is the mole percent of ethyl acetate in the mixture? Show your work.