The pKa of the acid is 4.05
Calculation of pKa:
pKa tells about the strength of acidic molecule.
[tex]pK_{a}= -log[K_a][/tex]
Where Ka is the dissociation constant of an acid.
According to Henderson-Hasselbalch equation:
[tex]pH= pK_{a} + log\frac{[salt]}{[acid]} \\[/tex]
pH= 4.41
Concentration of acid= 0.32M
Concentration of salt= 0.14M
Putting the values in the equation,
[tex]4.41= pK_{a} + log\frac{0.32}{0.14}\\\\4.41= pK_{a} + 0.36\\\\pK_{a}= 4.41 - 0.36\\pK_{a}= 4.05[/tex]
The pKa of the acid is 4.05.
Learn more about Henderson-Hasselbalch equation:
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