Ksp precipitation question?

Ksp precipitation question?calcium diphosphate is used to treat pseudogout.
if the calcium concentration of blood is 9.2mg/dL, and the Ksp for the calcium diphosphate is 8.64*10^-13, what minimum concentration of diphosphate results in the precipitation of calcium diphosphate

SciMann
_____Ca2P2O7 <-------> 2Ca+2 + P2O7-4

Ksp = [Ca+2]^2 * [P2O7-4]

8.64E-13 = (9.2mg/dl * 10dl/liter * 1 g/1000mg / atwt Ca g/mole)^2 * [P2O7-4]

SOLVE for [P2O7-4]

Basic mathematics is a prerequisite to chemistry – I just try to help you with the methodology of solving the problem.

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