CC(C)C1=C(O)C(=O)C2=C(C1=O)C(O)CC1C(C)(C)CCCC21C
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?