The concentration of Mg2+ in seawater is 5.0 * 10-2 M. What hydroxide concentration is needed to remove 90% of the Mg2+ by precipitation (For Mg(OH) 2, Ksp = 1.2 * 10-11.)
A) 5.1 * 10-5 M
B) 4.9 * 10-5 M
C) 4.7 * 10-5 M
D) 4.5 * 10-5 M
E) None of the above
Correct Answer:
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