9. Calculate the pH of the solution that results from each mixture. a. 50.0 mL of 0.15 M HCHO₂ with 75.0 mL of 0.13 M NACHO₂ b. What mass of sodium benzoate should you add to 150.0 mL of a 0.15 M benzoic acid solution to obtain a buffer with a pH of 4.25? (Assume no volume change)

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
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Chapter15: Acid–base Equilibria
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9. Calculate the pH of the solution that results from each mixture.
a. 50.0 mL of 0.15 M HCHO₂ with 75.0 mL of 0.13 M NACHO₂
b. What mass of sodium benzoate should you add to 150.0 mL of a 0.15 M benzoic acid solution to obtain
a buffer with a pH of 4.25? (Assume no volume change)
Transcribed Image Text:9. Calculate the pH of the solution that results from each mixture. a. 50.0 mL of 0.15 M HCHO₂ with 75.0 mL of 0.13 M NACHO₂ b. What mass of sodium benzoate should you add to 150.0 mL of a 0.15 M benzoic acid solution to obtain a buffer with a pH of 4.25? (Assume no volume change)
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