In a laboratory activity, 0.500 mole of NaOH(s) is completely dissolved in distilled water to form 400. millilit ers of NaOH(aq). This solution is then used to titrate a solution of HNO3(aq). This solution is then used to titrate a solution of HNO3(aq). -Another student substituted Mg(OH)2 for NaOH(s) to make a solution to be used in this titration. Which compound would be more soluble?