Calculate the solubility of lead (II) iodide, PbI2, when placed into a 0.025 M KI solution.

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- For confidence coefficient .99 , 1 - α = .99 ⇒ α = 1 - .99 = .01 . α/2 = .01/2 = .005 . Z α/2 = z .005 = 2.575 . The 99 % confidence interval for p is :

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