1. An extraction column (sketched below with the known process data) is used to remove acid from an oil stream by contacting it with pure water.  It can be assumed that the oil and water do not mix (i.e. there is no water in the oil streams and no oil in the water streams).

a)    On the flowchart, assign variables for the unknown flow rates and compositions.

b)    Write the oil balance for the column.

c)    Write the total material balance for the column.

d)    Write the water balance for the column.

e)    Write the acid balance for the column.