Friday, May 21, 2010

The corrosion of stainless steel containers in the proposed Yucca Mountain nuclear waste repository in Nevada?

The corrosion of stainless steel containers in the proposed Yucca Mountain nuclear waste repository in Nevada is a potential problem. One potentially corrosive ion is fluoride, which appears to be removed from solution by precipitation as calcium fluoride. In test measurements, the concentration of calcium ion was found to be 0.00128 M, and the concentration of fluoride ion was found to be 0.0222 g/L. What is the minimum value for Ksp for calcium fluoride based on these measurements ? Use units of moles and liters in your calculation.

The corrosion of stainless steel containers in the proposed Yucca Mountain nuclear waste repository in Nevada?
Fluoride concentration is given in grams per liter.





0.0222 g x (1 mol F / 19 g) = 0.00117 mol/L





Ksp = [Ca2+][F-]^2 = (0.00128)(0.00117)^2 = 1.75E-9

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