In addition to solvation free energies of anions, we also developed models to predict pK a values and gas-phase acidities. The pK a model demonstrated good performance, achieving an overall MAE of 0.58 pK a units on the full unseen test set. Moreover, when compared to other state-of-the-art multi-solvent pK a models from the literature, our pK a model showed competitive results in the SAMPL6 challenge and outperformed others in the SAMPL7 challenge. This good performance, despite a smaller training dataset, highlights the potential benefits of cleaning and curating data. Conversely, while the gas-phase acidity model provided reasonable predictions, it exhibited higher error margins, particularly when validated against experimental data.