What's the answer

Because calcium hydroxide, Ca(OH)2, has a very low solubility in water (Ksp = 4.7.10-6), it is difficult to directly measure its enthalpy of solution as we did with sodium sulfate decahydrate. However, Ca(OH)2(s) easily dissolves in strong acids owing to the neutralization of the OH (aq) with H*(aq). Thus, one can determine the enthalpy of solution for Ca(OH)2(s) from the following reactions: OH ( aq ) + H ( aq ) - H20 ( 1 ) AHor = AH1 Ca(OH) 2(5) + 2 H+(aq) - Ca2+ (aq) + 2 H20(1) AH, = AH2 What is the correct expression for evaluating the enthalpy of solution for Ca(OH) 2(S)? Ca(OH) 2(s) - Ca2+(aq) + 2 OH-(aq) AH soln = ? Select one: . AH soin = 2AH1 + AH2 . AH soin = - AH 12 + AH2 . AH soin = -2AH, + AH2 . AH soin = - AH1 + 2AH 2 . AH soin = AH1 + 2AH2 Check