Hydronium
noun ·Rare ·Advanced level
Definitions
- 1 The hydrated hydrogen ion, H₃O⁺. physical
"The case of hydronium ions (H₃O⁺) is an example of this. In the gase^([sic]) phase, hydronium is a weak acid. The data in Table 3.10 indicates that bare hydronium ions have a higher electron affinity than most metal surfaces, so a bare hydronium ion should be neutralized when it absorbs on a bare metal surface. However, a hydrated hydronium ion is a stronger acid."
Example
More examples"The case of hydronium ions (H₃O⁺) is an example of this. In the gase^([sic]) phase, hydronium is a weak acid. The data in Table 3.10 indicates that bare hydronium ions have a higher electron affinity than most metal surfaces, so a bare hydronium ion should be neutralized when it absorbs on a bare metal surface. However, a hydrated hydronium ion is a stronger acid."
Etymology
From hydro- + onium.
Related phrases
More for "hydronium"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.