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In treating an industrial wastewater, we add NaOH to remove Cr3+ ions (atomic weight) = 52)....

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Chemistry

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?

Answer & Explanation Solved by verified expert
3.6 Ratings (405 Votes)
Given Ksp 67 E 31 Lets calculate OH concentration in the solution pH 5 pOH 14pH 14 5 9 OH Antilog    See Answer
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