When water behaves as an acid, it donates one of its two protons and becomes a hydroxide ion. Figure 2. Water molecule behaving as an acid. When water behaves as a base, it accepts a proton and ...

Among the major reagent ions utilized is the hydronium ion (H 3 O +), which ionizes all compounds with proton affinities higher than water. This means it avoids interference from air’s major ...