The diagram shows equilibrium data for a binary mixture. The coordinates of the given points are xD = [0.95,0.95]; A = [0.30,0.50]; B = [0.0, 0.80]; C = [0.10, 1.0]

If the x-coordinate of point D = 0.82. what is the value of the y-coordinate?
ii. What is the value of  when the mixture consists almost entirely of the more volatile component?
iii. What is the value of  when the mixture consists almost entirely of the less volatile component?
If the line from A to xD is the top operating line of a column,
iv. What is the distillate composition?
v. What, approximately, is the liquid composition leaving the top tray?
Chemical &
Biological
Engineering.
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vi. What do you estimate to be the vapors composition reaching the top tray?
vii. What is the reflux ratio in this column?