Chapter 22, Problem 24R

To determine

To Compare: Hydronium ion-acid.

Explanation of Solution

Hydronium ( ${\text{H}}_3{\text{O}}^{+}$ ) ion is a positively charged ion formed when the ${\text{H}}^{+}$ ion produced by an acid interacts with the water molecules, when acid dissociates in water.

An acid is compound that has a tendency to produce ${\text{H}}^{+}$ ions in water. These ${\text{H}}^{+}$ ions combine with water molecules to form ${\text{H}}_3{\text{O}}^{+}$ ions.

Conclusion:Hydronium ( ${\text{H}}_3{\text{O}}^{+}$ ) ion is a positively charged ion formed when acid dissociates in water, while, an acid is compound that forms ${\text{H}}_3{\text{O}}^{+}$ ions on dissolving in water.