Question

When water dissociates, each water molecule splits into a hydroxide ion and ______. A) H 3 O + B) a hydrogen atom C) a hydrogen ion D) H 2 O E) OH —

Answer 1

When water dissociates, it splits into a hydroxide ion and a hydrogen ion (H+), which then often forms a hydronium ion (H3O+) in the presence of other water molecules.

Step-by-step explanation:

When water dissociates, each water molecule splits into a hydroxide ion and a hydrogen ion (H+). This is represented by the chemical equation:

H2O (l) → H+ (aq) + OH− (aq)

The molecule that receives a proton (H+) becomes the hydronium ion (H3O+), and the part that loses the proton becomes the hydroxide ion (OH−). The correct answer to the question is thus letter C) a hydrogen ion.

Answer 2

Answer: The correct answer is Option C.

Step-by-step explanation:

Water is a molecule which is formed by the combination of hydrogen and oxygen atoms. The chemical formula for this is
`H_2O`

Ionization is a special type of dissociation process. It is defined as the process in which a molecules splits into its ions.

When water dissociates, it leads to the formation of 2 ions, which are hydroxide ion and hydrogen ion.

The chemical equation for ionization or dissociation of water molecule is:

`H_2O(l)\rightarrow H^+(aq.)+OH^-(aq.)`

Hence, the correct answer is Option C.