1. (40 points) An aqueous feed solution of 1000 kg/h of acetic acid-water solution contains 30.0 wt % acetic acid and is to be extracted in a countercurrent multistage process with pure isopropyl ether to reduce the acid concentration to 6.0 wt% acid in the final raffinate. Use equilibrium data in Handout #9. Calculate the minimum solvent flow rate that can be used. If 2500 kg/h of ether solvent is used, determine the number of theoretical stages required. a. Handout #9 Phase Diagram for Water (A) / Isopropyl Ether (B) / Acetic Acid (C) 0.5 0.4 0.3 Mass Fraction Acetic Acid, C (XY) 0.2 0.1 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Mass Fraction Ether, B (Xg,YB)