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A storage tank is well-stirred and initially contains 200 kg of solution with a concentration of 1.0% salt by weight.
A storage tank is well-stirred and initially contains 200 kg of solution with a concentration of 1.0% salt by weight. Two separate feed streams are introduced into the tank at the same time that a product stream is withdrawn. The first feed stream enters the tank at a flow rate of 0.7 kg/min with a salt concentration of 5% by weight. The second feed stream enters at a flow rate of 0.8 kg/min and a salt concentration of 10% by weight. The product stream is withdrawn at a flow rate of 1.0 kg/min. The product stream is sampled after a certain amount of time has elapsed and was found to have a 5% by weight salt concentration.
(a) Determine the time when the product stream was sampled.
(b) Calculate the total mass in the tank for the time obtained in part-a
(c) Calculate the amount of salt in the tank for the time obtained in part-a.
