A stirred-tank blending system initially is full of water and is being fed pure water at a constant flow rate, q. At a particular time, an operator adds caustic solution at the same volumetric how rate q but concentration c1. If the liquid volume V is constant, the dynamic model for this process is; with c(0) = 0

What is the concentration response of the reactor effluent stream, c(t)? Sketch it as a function of time. Data: V = 2m3i, q = 0.4m3/min ct = 50kg/m3

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+ qe = qci de dt V.