Potable water containing not more than 500 ppm dissolved salt is made by desalinization by reverse osmosis of sea water which contains 3.1% salt. Fresh sea water is admitted at a rate of 1000 kg/h. Potable water is withdrawn from the reverse osmosis cell as product while a fraction of the brine that leaves the cell and containing 5.25% salt is recycled. The concentration of salt in the stream entering the cell after mixing the recycle stream with fresh sea water is 4.0%. Determine the following: The rate at which brine is removed from the plant, kg/h The rate at which potable water is produced, kg/h The fraction of the brine leaving the cell that isrecycled

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