Metal Hydroxides: Evaluating Completeness of Precipitation Part A The removal of

Question

Metal Hydroxides: Evaluating Completeness of Precipitation Part A The removal of an ion is sometimes considered to be complete when its concentration drops to 1.00 x 10-6 M. What concentration of hydroxide would cause Y2+ to·completely" precipitate from a solution? Express the molar concentration numerically. The hydroxide ion has the formula OH The solubility-product constants for three generic hydroxides are given here. Generic hydroxideIK Hints 2.50 x 10-8 Y(OH)2 2.80 x 10-10 Z(OH)7.90 x 10-15 XOH Use these values to answer the following questions. OH-] Submit My Answers Give Up

Explanation / Answer

Y(OH)2 -----------------------> Y+2 + 2OH-

Ksp = [Y+2][OH-]^2

2.80 x 10^-10 = 1.00 x 10^-6 [OH-]^2

[OH-] = 0.0167 M

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