Milk of magnesia is actually a suspension thats why

Question

Milk of Magnesia is actually a suspension (that's why instructions often mention shaking before use) of solid Mg(OH)₂. 1.00 liter of solution of 0.055 moles of Mg²⁺ is held at a pH of 7.00. Would a precipitate form? If so, what fraction of the original 0.055 molar Mg²⁺ would precipitate at that pH? Ksp = 5.61 x 10^-12

Mg(OH)_2(s)  Mg²⁺_(aq) + 2 OH^-_(aq)

• 0%
• 7%
• 15%
• 21%
• 26%