Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33, please answer a and b below.
a. If you wanted to make a pH 7 buffer solution starting with NaHCO3(aq), would you add 0.10 M HCl or 0.10 M NaOH?
0.10 M NaOH
0.10 M HCl
b. If you began with 11.5 mL of 0.47 M NaHCO3, how many mL of your choice from above would you need to add to get a pH 7 buffer?