Question

hydronium ions are always in the form H3O+ give reason

Answer 1

when acids are dissolved in water they dissociate into H+ions as H+is highly instable it does not exist so it combine with water to form hydronium ion

Answer 2

Question:

Why Hydronium ions are always in the form of H3O+

Answer:

Acids in water gives H+ ions. This H+ ions do not exist freely in water. This is because H+ is a single proton, a hydrogen atom has only one proton and electron. If the electron is removed to make H+, all that is left is an extremely tiny positively charged nucleus. This H+ ion will immediately combine with the surrounding water (H2O) molecules to form (H3O)+ Hydronium ion.