What is the relationship between [h3o+] and [oh-=] in terms of greater than less than or equal to in a neutral, acidic, and basic solution?

H3O + ions are responsible for the acidic nature of the medium and OH - ions are responsible for the basic nature of the medium.

When [H3O+] is equal to the [OH-] the solution is neutral.

When [H3O+] is greater than [OH-] the solution is acidic

When [H3O+] is lesser than [OH-] the solution is basic