It is desired to produce 1000 kg/h of Na3PO4 . 12H2O crystals from a feed solution containing 5.6 wt % Na3PO4 and traces of impurity. The original solution is first evaporated in an evaporator to a 35 wt% Na3PO4 solution and then cooled to 293 K in a crystallizer, where the hydrated crystals and a mother-liquor solution are removed. One out of every 10 kg of mother-liquor is discarded to waste to get rid of the impurities, and the remaining mother liquor is recycled to the evaporator. The solubility of Na3PO4 at 293 K is 9.91 wt %. Calculate the kg/h of feed solution and the kg/h of water evaporated.

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