A buffer solution is 0.337 M in H2CO3 and 0.239 M in KHCO3 . If Ka1 for H2CO3 is 4.2x10^-7 , what is the pH of this buffer solution? pH =

Chemistry: Principles and Reactions
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Author:William L. Masterton, Cecile N. Hurley
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Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 14QAP: A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to...
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1) A buffer solution is 0.337 M in H2CO3 and 0.239 M in KHCO3 . If  Ka1 for H2CO3  is 4.2x10^-7 , what is the pH of this buffer solution?

pH =

2) 

An aqueous solution contains 0.302 M hypochlorous acid.

How many mL of 0.231 M potassium hydroxide would have to be added to 150 mL of this solution in order to prepare a buffer with a pH of 7.540?

3) 

36.5 mL sample of a 0.310 M aqueous hypochlorous acid solution is titrated with a 0.441 M aqueous barium hydroxide solution. What is the pH after 8.80 mL of base have been added? Ka for HClO is 3.5x10^-8 .

pH =

 
 
 
 
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