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Q.2. Fresh water can be produced from seawater using a reverse osmosis process as shown below. Calculate the unknow mass flow rates and the value of R/E. R kg/h Sea water Brine Waste E kg/h Mixer Reverse Osmosis 1000 kg/h 3 wt% salt Fkg/h 4 wt% salt B kg/h 5 wt% salt D kg/h 0.05 wt% salt Fresh water Q.3. Formaldehyde is produced by dehydrogenation of methanol. CH3OH HCHO + H2 The single pass conversion is 67%. The product leaving the reactor is fed to a separation unit where formadehyde is separated from methanol and hydrogen. The separated methanol is recycled to the reactor. If the production rate of formadehyde is 1000 kg/h, calculate: (a) Calculate combined feed ration