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Use the Henderson-Hasselbalch equation to calculate the pH of each solution (Express all answers in two...

Use the Henderson-Hasselbalch equation to calculate the pH of each solution

(Express all answers in two decimal places)

A) a solution that is 0.155 M in propanoic acid and 0.110 M in potassium propanoate
B) a solution that contains 0.620% C5H5N by mass and 0.900% C5H5NHCl by mass
C) a solution that is 16.5 g of HF and 27.0 g of NaF in 125 mL of solution.

PART A)
Ka for propanoic acid is 1.3x10^-5
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