Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: spagettimnstr on February 25, 2013, 07:57:28 PM
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Hi. I'm stumped on something in my homework that I feel like shouldn't be a major obstacle.
The problem takes the following form:
Calculate the Ksp for the Y-substituted crystal X.4Y.6Z given the Ksp values for:
XZ -> X+ + Z-
YZ -> Y+ + Z-
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I can't figure out if I'm supposed to be doing some Hess's law-style combination of the two constituent solubility products, or if there's another approach that I'm missing altogether.
I understand that the Ksp of the substituted crystal should be [.4X].4[.6Y].6[Z] by doing an intial-change-equilibrium table, but again, I don't understand how to arrive at a numerical value. Thanks!