What is the value of Kb for the formate ion, HCOO - if the Ka for formic acid is 2.1 X 10 -4?   Group of answer choices

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter16: Principles Of Chemical Reactivity: The Chemistry Of Acids And Bases
Section16.7: Calculations With Equilibrium Constants
Problem 3RC: What are the pH and ion concentrations in a solution of 0.10 M sodium formate, NaCHO2? Kb for the...
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What is the value of Kb for the formate ion, HCOO - if the Ka for formic acid is 2.1 X 10 -4?  
Group of answer choices
- 2.1 X 10 -4
2.1 X 10  -4
6.9 X 10  - 6 
4.8 X 10  -11
2.1 X 10  -18
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