pH=pKa in which condition
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Explanation:
The "operational" relationship between pKa and pH is mathematically represented by Henderson-Hasselbach equation:
pH = pKa + log [A-] / [HA]
where [A-] represents the deprotonated form and [HA] represents the protonated form.
One oft-cited solution to this equation is obtained by arbitrarily setting pH = pKa
pH is equal to the pKa of the acid, there are equal amounts of protonated and deprotonated acid molecules.
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