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Recent research on the solubility of Greenockite, a thermodynamically stable form of cadmium sulfide (CdS), reveals that mildly acidic solutions with sulfide concentrations between 10-4 and 10-3 M can effectively minimize the solubility of CdS. Determine the final pH of one liter of solution at equilibrium with CdCO3(s) after addition of 4×10-4 moles of H2S and 1×10-2 M of NaCl. The pertinent complexation reactions are (neglect any other complexation reactions):
CdS complexationlogKsp=14.36logK1=-4.73logK2=2.33logK4=6.57logK5=-16.83logK6=-6.85
CdClK1=34.7K2=4.57K3=1.26K4=0.2
Use this and information to determine the concentration of the species you expect to find in this system.
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