NaCl crystals are produced from 1000 kg of solution containing 10% NaCl, 1% KOH, and 89% H2O. The solution is first sent to an evaporator where 750 kg of water from the solution is removed. The hot concentrated solution is sent to a crystallizer where the solution is cooled to 200C and NaCl crystals are precipitated. No water evaporates. Each kilogram of crystals carries with it 0.10 kg of adhering mother liquor. The wet crystals are then treated in a dryer where 95% of the water is removed. Calculate: a. The compositions of the concentrated solution from the evaporator b. The composition of the final product and c. The percentage recovery of NaCl from the original solution. The solubility of NaCl is 36 grams NaCl / 100 grams H2O at 200C. (Show diagram)

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.