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2. (10%) Gypsum (CaSO4) is common precipitates in water and wastewater treatment, including brackish water treatment....

2. (10%) Gypsum (CaSO4) is common precipitates in water and wastewater treatment, including brackish water treatment. CaSO4 ⇋ Ca2+ + SO42-

Ksp = 10^-4.6

Assume a water containing: [Ca2+] = 10-2.3 M; [SO42-] = 10-3.5 M. (a) Find Qsp or IAP for the given water. (b) Find the solubility index (SI) and determine whether CaSO4 is under, super, or at saturation in the water.

engineering   Civil-Engineering   
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