We're being asked to identify the weakest base based on the given pK values.
Ka represents the acid dissociation constant and it measures the strength of weak acids. In general:
• The higher the Ka the stronger the acid and the greater the concentration of H+
pKa is the negative base-10 logarithm of the base dissociation constant (Ka) of a solution.
• The lower the pKa, the stronger the acid
Kb represents the base dissociation constant and it measures the strength of weak bases. In general:
Given the following values of pK, which is the weakest base of those listed in the answers?
pKb of NH3 = 4.75
pKa of HNO2 = 3.37
pKb C5H5NH = 8.75
pKa of HBrO = 8.69
pKa of HClO = 7.53
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Ka and Kb concept. You can view video lessons to learn Ka and Kb. Or if you need more Ka and Kb practice, you can also practice Ka and Kb practice problems.