1.Given the following mole fraction and vapor pressures formiscible liquids A and B, calculate the composition (in molepercentage) of the vapor from a distilling an ideal binary solutionat 150°C and 760 mmHg for the solution
XA=0.50Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â PA=1710mmHg
XB=0.50Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â PB=130mmHg
2. Define the following.
Refluxing
Dalton’s Law
Raoult’s Law
3. What is the mole fraction of each component if 4.0 g ofbenzene (C6H6) is dissolved in 6.4 g oftoluene (C7H8)?
4. Consider the following solvent pairs. If mixed together,which pairs would form two layers? If they form two layers, whichsolvent would be on top?
Acetone and toluene
Methanol and hexanes
Hexanes and methylene chloride
Hexanes and water
5 .Chloroform is an excellent solvent for extracting caffeinefrom water. The distribution coefficient KD=(Cchloroform)/(C water) for caffeine in chloroform- water is 10 °C atroom temperature. Find the mass of caffeine that would be removedfrom a solution 4.0 g of caffeine in 100ml of water using a singleextraction of 100 ml of chloroform.
