What is the molar concentration of magnesium remaining in water after it has come to equilibrium at a ph of 7.2 after magnesium removal ?
Added by Kristy S.
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A water initially contains 40 mg · L^−1 of Mg^2+. The pH of the water is increased until the concentration of hydroxide ion (OH^−) is 0.001000 M. What is the concentration of magnesium ion in this water at this pH? Give your answer in milligrams per liter. Assume that the temperature of the solution is 25°C.
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Magnesium is seawater, present as soluble magnesium chloride, can be recovered in the form of solid magnesium hydroxide. If the Mg2+ concentration in a sample of seawater is 0.0537 M, will Mg(OH)2 precipitate when sufficient Ca(OH)2 is added such that the hydroxide concentration is 1.0 mM? (Ksp for Mg(OH)2 = 2.1 × 10-13)
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