Which of the following approximate pKa ranges for the following acids is correct?  You don't need a calculator (i.e., between 3 and 4, between 9 and 10 etc. There may be more than one correct answer.     HNO2  Ka = 4.0 x 10-4   pKa between 3 and 4     HCO3-  Ka = 6.3 x 10-11   pKa between 10 and 11     HCO2H  Ka = 2.0 x 10-4   pKa between 3 and 4     HCN  Ka = 7.9 x 10-10   pKa between 8 and 9

Chemistry by OpenStax (2015-05-04)
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ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter14: Acid-base Equilibria
Section: Chapter Questions
Problem 60E: Calculate the ionization constant for each of the following acids or bases form the ionization...
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Extra credit.  Which of the following approximate pKa ranges for the following acids is correct?  You don't need a calculator (i.e., between 3 and 4, between 9 and 10 etc. There may be more than one correct answer.
   
HNO2  Ka = 4.0 x 10-4   pKa between 3 and 4
   
HCO3-  Ka = 6.3 x 10-11   pKa between 10 and 11
   
HCO2H  Ka = 2.0 x 10-4   pKa between 3 and 4
   
HCN  Ka = 7.9 x 10-10   pKa between 8 and 9
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