It is desired to produce 1000 kg/h of NaPO4. 12HO crystals from a feed solution containing 5.6 wt % Na:PO: and traces of impurity. The original solution is first evaporated in an evaporator to a 35 wt% N2PO4 solution and then cooled to 293 K in a crystallizer, where the hydrated arystals 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 recyded to the evaporator. The solubility of Na:PO, 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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Principal Quantities and EOS

A physical quantity represents the physical state of a system. It is expressed as the product of a number and unit. The basic quantities used in science are length, mass, and time. The principal quantities are the quantities that are independent of other quantities.