1. The problem statement, all variables and given/known data Ethane reacts with chlorine to make ethyl chloride and hydrogen chloride, and ethylene reacts with hydrogen chloride to form ethyl chloride. C2h6+ Cl2 > C2H5Cl + HCL C2H4 + HCl > C2H5Cl I post an image of flow chart and rest of description Based on my reading, all of unreacted ethane is removed along with ethyl chloride... 2. Relevant equations C2h6+ Cl2 > C2H5Cl + HCL C2H4 + HCl > C2H5Cl 3. The attempt at a solution I want to solve it in a matrix form, then do it in matlab. However I can not formulate my matrix.... I can see ethane being limiting reagent m1 = feed stream contain ethane and ethylene R = recycle stream m3 = feed stream of Cl2 m4 = ethyl chloride formed from 1st reaction (ethane + cl2) m5 = ethyl chloride formed from 2nd rxn (C2H4 + HCl > C2H5Cl) This is my attempt; I understand I will have to simplied it to matrix form first. for ethane 0.5 m1 - 0.95 (.5 m1) - m4 = 0 for ethylene x = molar ration of ethylene 0.5 m1 + xR - 0.5 (0.5m1 + xR) -m5 =0 Am I on the right track? My question is How do i determine the composition of R?