3) Arsenic acid has 3 pK,'s: 2.19, 6.94, and 11.51. Determine the concentrations of all the species (H,ASO, → ASO,) at pH 7.00. Would this be a good buffer at this pH? Explain.

Principles of Modern Chemistry
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ISBN:9781305079113
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Chapter15: Acid–base Equilibria
Section: Chapter Questions
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3) Arsenic acid has 3 pK's: 2.19, 6.94, and 11.51. Detemine the concentrations of all the species
(H,ASO, → ASO, ) at pH 7.00. Would this be a good buffer at this pH? Explain.
4) For a 0.500 M solution of HOAC at pH 4.757, how much KOH (in g) needs to be added to get to pH
5.136?
5) A certain monoprotic weak acid gave a pH of 2.336 when a 0.447 M solution was made. What is
the pK,?
Transcribed Image Text:3) Arsenic acid has 3 pK's: 2.19, 6.94, and 11.51. Detemine the concentrations of all the species (H,ASO, → ASO, ) at pH 7.00. Would this be a good buffer at this pH? Explain. 4) For a 0.500 M solution of HOAC at pH 4.757, how much KOH (in g) needs to be added to get to pH 5.136? 5) A certain monoprotic weak acid gave a pH of 2.336 when a 0.447 M solution was made. What is the pK,?
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