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Consider the mixing flow sheet in Figure 1 used to dissolve a substance A in water. The flow rates of streams 1 and 5 are

Consider the mixing flow sheet in Figure 1 used to dissolve a substance A in water. The flow rates of streams 1 and 5 are 5 and 200 tph respectively. Stream 1 is 100% A and stream 5 is 5% A.(Note, the splitter controls the amount of solution that is recycled. The compositions of streams 6 and 4 are the same.)
a) Calculate the flow rate and composition of the product (stream 4).(Do an overall balance that "hides" the recycle.)
b) Assume that the flow rate of stream 6 is 50tph. Calculate the flow rates and composition of streams 2 and 3, and the flow rate of A in stream 2.
c) Comment on and explain the flow rate and composition of stream 4.
d) Repeat (b) and (c) assuming the flow rate of stream 6 is 100tph,200tph,500tph.
e) From your observations what do you learn about the nature of systems that have recycle streams?
Consider the following two-unit process in Figure 2 used to separate two components A and B.
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