Which of the following combinations would make a buffer with pH closest to 9.0? HClO2   Ka = 1.1 × 10-2 NH3   Kb = 1.8 × 10-5 HNO2   Ka = 7.2 × 10-4 C5H5N   Kb = 1.5 × 10-9   Equal volumes of 0.10 M HCl and 0.10 M NaCl       Equal volumes of 0.10 M HNO2 and 0.10 M NaNO2       Equal volumes of 0.10 M NH4Cl and 0.10 M NH3       Equal volumes of 0.10 M HClO2 and 0.10 M NaClO2       Equal volumes of 0.10 M C5H5NHCl and 0.10 M C5H5N

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Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 59E: Consider the titration of 100.0 mL of 0.200 M acetic acid (Ka = 1.8 105) by 0.100 M KOH. Calculate...
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Which of the following combinations would make a buffer with pH closest to 9.0?
HClO2   Ka = 1.1 × 10-2
NH3   Kb = 1.8 × 10-5
HNO2   Ka = 7.2 × 10-4
C5H5N   Kb = 1.5 × 10-9

 

Equal volumes of 0.10 M HCl and 0.10 M NaCl
 
 
 
Equal volumes of 0.10 M HNO2 and 0.10 M NaNO2
 
 
 
Equal volumes of 0.10 M NH4Cl and 0.10 M NH3
 
 
 
Equal volumes of 0.10 M HClO2 and 0.10 M NaClO2
 
 
 
Equal volumes of 0.10 M C5H5NHCl and 0.10 M C5H5N
 
 
 
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