At 25C the volume of a sample of pure HCl gas was 189mL and108mm Hg. It was wholly dissolved in about 60mL of water and titrated with an NaOh soution; 15.7mL of the NaOH solution were needed to neutralize the HCl. Compute the molarity of the NaOH solution.
Is the reaction: HCl + H2O + NaOH -> NaCl + 2H2O