Another way to make CoS more soluble in aqueous solutions is to add an inert salt like potassium…
Another way to make CoS more soluble in aqueous solutions is to add an inert salt like potassium nitrate, even though neither potassium nor nitrate show up in the BCE for the dissolution reaction. The solubility product constant for cobalt (II) sulfide is Ksp = 5 x 10-22 making it a remarkably insoluble substance. Figure out the molar solubility in pure water, then the molar solubility in a 0.25 M KNO3 aqueous solution and finally to express the change as a percent difference. Use the Debye-Hückel limiting law: log γx = -0.510 Zx2 (µ)1/2 to obtain the required activity coefficients and make a simple assumption about the ionic strength of water – rather than solving for it in an iterative process. Apr 25 2022 03:17 PM
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