The mixing process might be explained as follows: a stream with solute concentration Ci (pounds/volume) is fed to the perfectly stirred tank at a constant flow rate of q (volume/time). The perfectly mixed product is withdrawn from the tank, as well at the flow rate q at the similar concentration as the material in the tank, C. The total volume of solution in tank is constant at V. Density might be considered to be independent of the concentration.
A trace of the tank concentration versus the time appears as shown in the figure below:
Q1. Plot on this similar figure your best guess of the quantitative behavior of the inlet concentration versus the time. Be sure to label the graph with quantitative information concerning times and magnitudes and any other data which will explain your understanding of the condition.
Q2. Write down an equation for Ci as a function of the time.