What is the pH of a solution that contains 0.2 M H2CO3 (carbonic acid) and 0.2 M NaHCO3? The pKa of carbonic acid is 6.4
A. 6.7
B. 6.4
C. 6.0
D. 5.8
E. 5.3
B 6.4 = pKa + log 0.2 M/0.2 M
Biology & Microbiology
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