Follow the steps of Sec. 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, and so on.
A vat holds 2.25(103) kg of a 22.0% solution of ethylene glycol and water. How much must be drained from the tank and replaced with an 85.0% ethylene glycol solution to obtain a 33.0% concentrate? Assume percentage values are based on mass.
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