Question

A buffer solution is prepared by mixing 23.6 mL of 0.398 M sodium dihydrogen citrate with 36.6 mL of 0.881 M sodium hydrogen citrate A table of pKa values can be found here 1. Calculate the pH (to two decimal places) of this solution Assume the 5% approximation is valid and that the volumes are additive. Submit Answer Tries 0/3 2. Calculate the pH (to two decimal places) of the buffer solution after the addition of 24.9 mL of a 0.626 M solution of hydrobromic acid to the existing buffer solution Assume the 5% approximation is valid and that the volumes are additive. Submit Answer Tries o/3

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Answer #1

4: 3.5 bafs CEHCOT 32 2446 32.2 446 35 -01 e 3.5 32-299 S. SE 7 84. 91 16. 6 S76 6.6S76 ka f r冫 : 3.33 , 새 : | 3.33

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