In treating an industrial wastewater, we add NaOH to remove Cr3+
ions (atomic weight) = 52)....
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In treating an industrial wastewater, we add NaOH to remove Cr3+ions (atomic weight) = 52). The chemical equation for thedissolution of Cr(OH)3 is Cr(OH)3 (s) ↔ Cr3+ + 3OH-    (Ksp =6.7*10-31) What is the final equilibrium concentration (in mg/L) of Cr3+ ionsin a solution of Cr(OH)3 when the water has a pH of 5?
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Given Ksp 67 E 31 Lets calculate OH concentration in the solution pH 5 pOH 14pH 14 5 9 OH Antilog
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