#2 of 5 hotels in Chenonceaux. â 1  Best romantic chateau of the Loire Valley 2  â. Roseraie hotel is really close to the Chateau. 3  November 27, 2016.
A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond. In this coordinate covalent bond, the oxygen from the water... A hydronium ion is formed when a positively charged hydrogen ion bonds with a molecule of water through a coordinate covalent bond.
Hydroxide = OH^-; hydronium ion is represented as H^+ or H_3O^+. The hydronium ion and the hydroxide are respectively the characteristic cation, and anion of water. The constitution of the hydronium ion is debatable. As far as anyone knows, it is 3 or 4 water molecules with an extra proton tacked on, say (O_3H_7)^+.