Question

how do (H+) ions exist in water ?

Answer 1

H+ ions exist in water in the form of hydronium ions ( the most precise answer)

Answer 2

The hydronium ion ((H+) ions) is an essential factor while dealing with chemical reactions which occur in aqueous solutions.

Explanation:

• The hydroxide concentration is a direct measure of a solution's pH. This may be formed in water/pure water where an acid exist. H3O+ is its chemical formula By combining an H+ion with an H2O molecule, it is formed too.
• The H+ion has a trigonal pyramidal geometry and comprises 1 oxygen atom and 3 hydrogen atoms. There is a single pair of electrons in oxygen  that gives it this shape. Between the atoms, the bond angle is  around 113 degree. ---- H2O(l)⇌OH−(aq)+H+(aq
• As H+ions are formed, they bond with H2O molecules in the solution to form H3O+(the hydronium-ion). This is due to the hydrogen ions that is not present in aqueous solutions, however takes the form of water H2O