Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33, answer the following. (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 HCl (b) If you began with 8.0 mL of 0.18 M NaHCO3, how many mL of your choice from (a) would you need to add to get a pH 7 buffer? __________ mL

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18 Dec 2019

Given that carbonic acid, H₂CO₃, has a pK_a1 = 6.37 and a pK_a2 = 10.33, answer the following.

(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 HCl

(b) If you began with 8.0 mL of 0.18 M NaHCO₃, how many mL of your choice from (a) would you need to add to get a pH 7 buffer?
__________ mL

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