O=S(=O)(NC1CC(NS(=O)(=O)OCC(Cl)(Cl)Cl)C2CCCCC12)OCC(Cl)(Cl)Cl
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?