1. During a standarization of sodium hydroxide solution, it takes 12.35mL of 0.100 M HCl(aq) to neutralize a 25.00 mL sample of the NaOH(aq) solution. What is the concentration of the NaOH(aq) solution?
2. Using the NaOH(aq) solution standardized in Problem 1, a 25.00 mL sample of an unknown concentration nitric acid solution is titrated. If 5.17 mL of NaOH(aq) solution is utilized for the titration, what is the concentration of the unknown solution?