Consider a solution that contains 0.0200 M Ca²⁺ and 0.0250 M Pb²⁺. An analyst wants to separate these ions by precipation with sulfate. Using the Kₛₚ values given below, answer the following three question regrading this separation. The Kₛₚ of CaSO₄ is 2.4 x 10⁻⁵ and the Kₛₚ for PbSO₄ is 6.3 x 10⁻⁷. Which ion will precipitate first upon addition of sulfate?
O Ca²⁺ will precipitate first as CaSO₄
O Pb²⁺ will precipitate first as PbSO₄
O They will precipitate at the same time.
O There is not enough information to answer the question
