Please give detailed solution .... and give the explanation of the concept..   A saturated solution of calcium hydroxide, Ca(OH)2, is in contact with excess solid Ca(OH)2. Which of the following statements correctly describes what will happen when aqueous HCl (a strong acid) is added to this mixture, and system returns to equilibrium? (For Ca(OH)2, Ksp = 6.5 × 10–6)   A. The solubility of Ca(OH)2 will decrease. B. The OH– concentration will increase and the Ca2+ concentration will decrease. C. The solubility of Ca(OH)2 will be unchanged. D. The OH– concentration will decrease and the Ca2+ concentration will increase. E. The concentrations of both Ca2+ and OH– will increase.

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