0.50 M solutions of each of the following acids are prepared: HCN (pKa = 9.31) and H 2 CO 3 (pKa = XXXXXXXXXXa. Which solution will have the lower pH? Explain. b. Which solution will have the lower...

0.50 M solutions of each of the following acids are prepared: HCN (pKa = 9.31) and H 2 CO 3 (pKa = 6.36). a. Which solution will have the lower pH? Explain. b. Which solution will have the lower [OH-]? Explain. a. How many moles of NaOH are present in 31.7 mL of 0.155 M NaOH? b. How many moles of HCl are present in a 15.0 mL sample that is neutralized by the 31.7 mL of 0.155 M NaOH? c. What is the molar concentration of the HCl solution described in part b of this question?