Question

Which represents the self-ionization of water at 25°C? H2O + H2O 2H2 + O2 H2O + H2O H2O2 + H2 H2O + H2O 4H+ + 2O2- H2O + H2O H3O+ + OH-

Answer 1

The fourth answer is correct
H20 + H20 H30 + 0H-

Answer 2

Answer: Option (d) is the correct answer.

Step-by-step explanation:

When molecules of same substance combine together to result in the formation of ions then this type of reaction is known as self-ionization.

For example,
`H_(2)O + H_(2)O \rightarrow H_(3)O^(+) + OH^(-)`

So, here two molecules of water are combining and they result in the formation of hydronium ion (
`H_(3)O^(+)`) and hydroxide ion (
`OH^(-)`).

Hence, this reaction is a self-ionization reaction.