5.8. A mixing process may be described as follows: A stream with solute concentration Ci (pounds/volume) is fed to a perfectly stirred tank at a constant flow rate of q (volume/time). The perfectly mixed product is withdrawn from the tank, also at the flow rate q at the same concentration as the material in the tank Co. The total volume of solution in the tank is constant at V. Density may be considered to be inde- C (Ib/gal) 2.1 2.0 1.9 1.8 1.7 6:30 A.M. 6:52 Time A.M. pendent of concentration. A trace of the tank concentration versus time appears as shown in Fig. P5-8. (a) Plot on this same figure your best guess of the quantitative behavior of the inlet concentration versus time. Be sure to label the graph with quantitative infor- mation regarding times and magnitudes and any other data that will demonstrate your understanding of the situation. (b) Write an equation for C; as a function of time. Data: tank dimensions: 8 ft high by 5-ft diameter Tank volume V: 700 gal