: A hydrogen is more acidic if the remaining molecule (the conjugate base) is stable after the proton leaves. Resonance, where the remaining negative charge can spread out over several atoms, is a common way this stability is achieved.
: In acetic acid (vinegar), the hydrogen attached to the oxygen in the −COOHnegative cap C cap O cap O cap H group is acidic. Strong Mineral Acids : In hydrochloric acid ( HClcap H cap C l acid hydrogen
), the hydrogen is bonded to a chlorine atom, which easily releases the proton in water. : A hydrogen is more acidic if the
An (or acidic hydrogen) is a hydrogen atom in a molecule that can be released as a proton ( H+cap H raised to the positive power ) when reacting with a base. What Makes a Hydrogen Acidic? Strong Mineral Acids : In hydrochloric acid (
: When these hydrogens are released into water, they increase the concentration of hydronium ions ( H3O+cap H sub 3 cap O raised to the positive power ), which lowers the pH of the solution. Common Examples