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An aqueous caustic stream mixture containing 20% (by weight) sodium hydroxide (NaOH) is fed to an...

An aqueous caustic stream mixture containing 20% (by weight) sodium hydroxide (NaOH) is fed to an evaporator to remove 50% of the water in the feed stream. Draw and label a PFD of the process. Using a Degree of Freedom analysis show that there is insufficient information to allow you to balance the PFD. If you assume a basis of a feed stream of 100 kg/h can you now proceed? If so calculate all unknown stream flows and compositions. Express the flow rate and composition of the concentrated caustic stream in molar quantities.

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