2.

A spent sulfuric acid solution is brought up to strength for a pickling process in

a mixer. Spent solution at 3% sulfuric acid (by weight) is mixed with a 50% solution (by

weight) to obtain the desired product concentration of 40% acid by weight. All are aqueous

solutions. Determine all flow rates on the basis of 100 lbm/h of product. If the actual flow

of the spent stream is 300 lbm/h, what must the flow rates of the streams be?