How does the amount of hydronium ions compare to the amount of hydroxide ions?

In a neutral solution, the amount of hydronium ions (H3O+) is equal to the amount of hydroxide ions (OH-), giving a pH of 7. However, in acidic solutions, there are more hydronium ions than hydroxide ions, leading to a pH less than 7. In basic solutions, there are more hydroxide ions than hydronium ions, resulting in a pH greater than 7.