A buffer solution results from mixing 80.0 mL of 0.500 mol L- HCN and 25.0 mL of 0.150 mol L-1 KCN using the Henderson-Hasselbalch equation. The Ka of HCN is 8.2 X 10'“). Calculate the pH of the buffer. 0 8.26 o 9.26 o 8.33 O 9.43
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