Constants | Periodic Table The hydroxide ion has the formula OH?. The solubility
ID: 706913 • Letter: C
Question
Constants | Periodic Table
The hydroxide ion has the formula OH?. The solubility product constants for three generic hydroxides are given here.
Use these values to answer the following questions.
The removal of an ion is sometimes considered to be complete when its concentration drops to 1.00×10?6 mol L?1. What concentration of hydroxide would cause Y2+ to "completely" precipitate from a solution?
Express your answer with the appropriate units.
Generic hydroxide Ksp XOH 1.50×10?8 Y(OH)2 2.40×10?10 Z(OH)3 9.20×10?15Explanation / Answer
Y(OH)2 <-------------------------> Y2+ + 2OH-
Ksp = [Y2+] [OH-]^2
2.40 x 10^-10 = (1.00 x 10^-6) [OH-]^2
[OH-] = 0.0155 M
concentration of hydroxide = 0.0155 M
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