What is the mass of water in the final mixture? total = 185kg compos tion bwale 350-185 = 165hg 7. to measure the flowrate of an effluent stream, 5 kg/h of sodium chloride is added continuously to the stream, which initially has sodium chloride concentration of 0.002 wt%. downstream of the introduction point, a sample of the effluent stream shows 0.05 wt% sodium chloride. assuming steady state operation and that the added sodium chloride is well mixed with the effluen stream by the time the sample is taken, calculate the mass flow rate of the effluent stream in kg/h