You want a buffer with a pH of 7.34. How much 0.10 M NaOH would you have to add to 75 mL of 0.10 M hypochlorous acid to make this buffer?
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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
(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 Correct:
(b) If you began with 6.0 mL of 0.19 M NaHCO3, how many mL of your choice from (a) would you need to add to get a pH 7 buffer? mL
answer: 0.10 M HCl
(b) If you began with 6.5 mL of 0.45 M NaHCO3, how many mL of your choice from (a) would you need to add to get a pH 7 buffer? mL