We are asked to identify the weakest acid given.
pKa is the negative base-10 logarithm of the acid dissociation constant (Ka) of a solution.
The lower the pKa value, the stronger the acid.
pKb is the negative base-10 logarithm of the base dissociation constant (Kb) of a solution.
The lower the pKb value, the stronger the base or the weaker.
Given the following values of pK, which is the weakest acid of those listed in the answers?
pKb of NH3 = 4.75
pKa of HNO2 = 3.37
pKb of C5H5NH = 8.75
pKa of HBrO = 8.69
pKa of HClO = 7.53
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