kj
457/854=78mol
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A mineral sample is analyzed for its cobalt and calcium content. A sample is dissolved, and then the cobalt and calcium are precipitated as Co(OH)2(s) and Ca(OH)2(s). At what pH can Co(OH)2(s) be separated from Ca(OH)2(s) at 25 °C? Assume that an effective separation requires a maximum concentration of the less soluble hydroxide of 1× 10^–6 M.
Ksp[Co(OH02]=5.9e-15
Ksp[Ca(OH02]=5.0e-6
What is the concentration of the more soluble hydroxide at this pH?
I got 9.89 for the pH, and that was right. I am having trouble with the concentration.
1 answer